2 * Procedures for interfacing to Open Firmware.
4 * Paul Mackerras August 1996.
5 * Copyright (C) 1996-2005 Paul Mackerras.
7 * Adapted for 64bit PowerPC by Dave Engebretsen and Peter Bergner.
8 * {engebret|bergner}@us.ibm.com
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public License
12 * as published by the Free Software Foundation; either version
13 * 2 of the License, or (at your option) any later version.
19 #include <linux/kernel.h>
20 #include <linux/string.h>
21 #include <linux/init.h>
22 #include <linux/threads.h>
23 #include <linux/spinlock.h>
24 #include <linux/types.h>
25 #include <linux/pci.h>
26 #include <linux/proc_fs.h>
27 #include <linux/stringify.h>
28 #include <linux/delay.h>
29 #include <linux/initrd.h>
30 #include <linux/bitops.h>
34 #include <asm/processor.h>
38 #include <asm/system.h>
40 #include <asm/pgtable.h>
42 #include <asm/iommu.h>
43 #include <asm/btext.h>
44 #include <asm/sections.h>
45 #include <asm/machdep.h>
47 #include <linux/linux_logo.h>
50 * Properties whose value is longer than this get excluded from our
51 * copy of the device tree. This value does need to be big enough to
52 * ensure that we don't lose things like the interrupt-map property
53 * on a PCI-PCI bridge.
55 #define MAX_PROPERTY_LENGTH (1UL * 1024 * 1024)
58 * Eventually bump that one up
60 #define DEVTREE_CHUNK_SIZE 0x100000
63 * This is the size of the local memory reserve map that gets copied
64 * into the boot params passed to the kernel. That size is totally
65 * flexible as the kernel just reads the list until it encounters an
66 * entry with size 0, so it can be changed without breaking binary
69 #define MEM_RESERVE_MAP_SIZE 8
72 * prom_init() is called very early on, before the kernel text
73 * and data have been mapped to KERNELBASE. At this point the code
74 * is running at whatever address it has been loaded at.
75 * On ppc32 we compile with -mrelocatable, which means that references
76 * to extern and static variables get relocated automatically.
77 * On ppc64 we have to relocate the references explicitly with
78 * RELOC. (Note that strings count as static variables.)
80 * Because OF may have mapped I/O devices into the area starting at
81 * KERNELBASE, particularly on CHRP machines, we can't safely call
82 * OF once the kernel has been mapped to KERNELBASE. Therefore all
83 * OF calls must be done within prom_init().
85 * ADDR is used in calls to call_prom. The 4th and following
86 * arguments to call_prom should be 32-bit values.
87 * On ppc64, 64 bit values are truncated to 32 bits (and
88 * fortunately don't get interpreted as two arguments).
91 #define RELOC(x) (*PTRRELOC(&(x)))
92 #define ADDR(x) (u32) add_reloc_offset((unsigned long)(x))
93 #define OF_WORKAROUNDS 0
96 #define ADDR(x) (u32) (x)
97 #define OF_WORKAROUNDS of_workarounds
101 #define OF_WA_CLAIM 1 /* do phys/virt claim separately, then map */
102 #define OF_WA_LONGTRAIL 2
104 #define PROM_BUG() do { \
105 prom_printf("kernel BUG at %s line 0x%x!\n", \
106 RELOC(__FILE__), __LINE__); \
107 __asm__ __volatile__(".long " BUG_ILLEGAL_INSTR); \
111 #define prom_debug(x...) prom_printf(x)
113 #define prom_debug(x...)
117 typedef u32 prom_arg_t
;
135 struct mem_map_entry
{
142 extern void __start(unsigned long r3
, unsigned long r4
, unsigned long r5
);
145 extern int enter_prom(struct prom_args
*args
, unsigned long entry
);
147 static inline int enter_prom(struct prom_args
*args
, unsigned long entry
)
149 return ((int (*)(struct prom_args
*))entry
)(args
);
153 extern void copy_and_flush(unsigned long dest
, unsigned long src
,
154 unsigned long size
, unsigned long offset
);
157 static struct prom_t __initdata prom
;
159 static unsigned long prom_entry __initdata
;
161 #define PROM_SCRATCH_SIZE 256
163 static char __initdata of_stdout_device
[256];
164 static char __initdata prom_scratch
[PROM_SCRATCH_SIZE
];
166 static unsigned long __initdata dt_header_start
;
167 static unsigned long __initdata dt_struct_start
, dt_struct_end
;
168 static unsigned long __initdata dt_string_start
, dt_string_end
;
170 static unsigned long __initdata prom_initrd_start
, prom_initrd_end
;
173 static int __initdata prom_iommu_force_on
;
174 static int __initdata prom_iommu_off
;
175 static unsigned long __initdata prom_tce_alloc_start
;
176 static unsigned long __initdata prom_tce_alloc_end
;
179 /* Platforms codes are now obsolete in the kernel. Now only used within this
180 * file and ultimately gone too. Feel free to change them if you need, they
181 * are not shared with anything outside of this file anymore
183 #define PLATFORM_PSERIES 0x0100
184 #define PLATFORM_PSERIES_LPAR 0x0101
185 #define PLATFORM_LPAR 0x0001
186 #define PLATFORM_POWERMAC 0x0400
187 #define PLATFORM_GENERIC 0x0500
189 static int __initdata of_platform
;
191 static char __initdata prom_cmd_line
[COMMAND_LINE_SIZE
];
193 static unsigned long __initdata prom_memory_limit
;
195 static unsigned long __initdata alloc_top
;
196 static unsigned long __initdata alloc_top_high
;
197 static unsigned long __initdata alloc_bottom
;
198 static unsigned long __initdata rmo_top
;
199 static unsigned long __initdata ram_top
;
201 static struct mem_map_entry __initdata mem_reserve_map
[MEM_RESERVE_MAP_SIZE
];
202 static int __initdata mem_reserve_cnt
;
204 static cell_t __initdata regbuf
[1024];
208 * Error results ... some OF calls will return "-1" on error, some
209 * will return 0, some will return either. To simplify, here are
210 * macros to use with any ihandle or phandle return value to check if
214 #define PROM_ERROR (-1u)
215 #define PHANDLE_VALID(p) ((p) != 0 && (p) != PROM_ERROR)
216 #define IHANDLE_VALID(i) ((i) != 0 && (i) != PROM_ERROR)
219 /* This is the one and *ONLY* place where we actually call open
223 static int __init
call_prom(const char *service
, int nargs
, int nret
, ...)
226 struct prom_args args
;
229 args
.service
= ADDR(service
);
233 va_start(list
, nret
);
234 for (i
= 0; i
< nargs
; i
++)
235 args
.args
[i
] = va_arg(list
, prom_arg_t
);
238 for (i
= 0; i
< nret
; i
++)
239 args
.args
[nargs
+i
] = 0;
241 if (enter_prom(&args
, RELOC(prom_entry
)) < 0)
244 return (nret
> 0) ? args
.args
[nargs
] : 0;
247 static int __init
call_prom_ret(const char *service
, int nargs
, int nret
,
248 prom_arg_t
*rets
, ...)
251 struct prom_args args
;
254 args
.service
= ADDR(service
);
258 va_start(list
, rets
);
259 for (i
= 0; i
< nargs
; i
++)
260 args
.args
[i
] = va_arg(list
, prom_arg_t
);
263 for (i
= 0; i
< nret
; i
++)
264 args
.args
[nargs
+i
] = 0;
266 if (enter_prom(&args
, RELOC(prom_entry
)) < 0)
270 for (i
= 1; i
< nret
; ++i
)
271 rets
[i
-1] = args
.args
[nargs
+i
];
273 return (nret
> 0) ? args
.args
[nargs
] : 0;
277 static void __init
prom_print(const char *msg
)
280 struct prom_t
*_prom
= &RELOC(prom
);
282 if (_prom
->stdout
== 0)
285 for (p
= msg
; *p
!= 0; p
= q
) {
286 for (q
= p
; *q
!= 0 && *q
!= '\n'; ++q
)
289 call_prom("write", 3, 1, _prom
->stdout
, p
, q
- p
);
293 call_prom("write", 3, 1, _prom
->stdout
, ADDR("\r\n"), 2);
298 static void __init
prom_print_hex(unsigned long val
)
300 int i
, nibbles
= sizeof(val
)*2;
301 char buf
[sizeof(val
)*2+1];
302 struct prom_t
*_prom
= &RELOC(prom
);
304 for (i
= nibbles
-1; i
>= 0; i
--) {
305 buf
[i
] = (val
& 0xf) + '0';
307 buf
[i
] += ('a'-'0'-10);
311 call_prom("write", 3, 1, _prom
->stdout
, buf
, nibbles
);
314 /* max number of decimal digits in an unsigned long */
316 static void __init
prom_print_dec(unsigned long val
)
319 char buf
[UL_DIGITS
+1];
320 struct prom_t
*_prom
= &RELOC(prom
);
322 for (i
= UL_DIGITS
-1; i
>= 0; i
--) {
323 buf
[i
] = (val
% 10) + '0';
328 /* shift stuff down */
329 size
= UL_DIGITS
- i
;
330 call_prom("write", 3, 1, _prom
->stdout
, buf
+i
, size
);
333 static void __init
prom_printf(const char *format
, ...)
335 const char *p
, *q
, *s
;
338 struct prom_t
*_prom
= &RELOC(prom
);
340 va_start(args
, format
);
342 format
= PTRRELOC(format
);
344 for (p
= format
; *p
!= 0; p
= q
) {
345 for (q
= p
; *q
!= 0 && *q
!= '\n' && *q
!= '%'; ++q
)
348 call_prom("write", 3, 1, _prom
->stdout
, p
, q
- p
);
353 call_prom("write", 3, 1, _prom
->stdout
,
363 s
= va_arg(args
, const char *);
368 v
= va_arg(args
, unsigned long);
373 if (*q
== 'u') { /* '%lu' */
375 v
= va_arg(args
, unsigned long);
384 static unsigned int __init
prom_claim(unsigned long virt
, unsigned long size
,
387 struct prom_t
*_prom
= &RELOC(prom
);
389 if (align
== 0 && (OF_WORKAROUNDS
& OF_WA_CLAIM
)) {
391 * Old OF requires we claim physical and virtual separately
392 * and then map explicitly (assuming virtual mode)
397 ret
= call_prom_ret("call-method", 5, 2, &result
,
398 ADDR("claim"), _prom
->memory
,
400 if (ret
!= 0 || result
== -1)
402 ret
= call_prom_ret("call-method", 5, 2, &result
,
403 ADDR("claim"), _prom
->mmumap
,
406 call_prom("call-method", 4, 1, ADDR("release"),
407 _prom
->memory
, size
, virt
);
410 /* the 0x12 is M (coherence) + PP == read/write */
411 call_prom("call-method", 6, 1,
412 ADDR("map"), _prom
->mmumap
, 0x12, size
, virt
, virt
);
415 return call_prom("claim", 3, 1, (prom_arg_t
)virt
, (prom_arg_t
)size
,
419 static void __init
__attribute__((noreturn
)) prom_panic(const char *reason
)
422 reason
= PTRRELOC(reason
);
425 /* Do not call exit because it clears the screen on pmac
426 * it also causes some sort of double-fault on early pmacs */
427 if (RELOC(of_platform
) == PLATFORM_POWERMAC
)
430 /* ToDo: should put up an SRC here on p/iSeries */
431 call_prom("exit", 0, 0);
433 for (;;) /* should never get here */
438 static int __init
prom_next_node(phandle
*nodep
)
442 if ((node
= *nodep
) != 0
443 && (*nodep
= call_prom("child", 1, 1, node
)) != 0)
445 if ((*nodep
= call_prom("peer", 1, 1, node
)) != 0)
448 if ((node
= call_prom("parent", 1, 1, node
)) == 0)
450 if ((*nodep
= call_prom("peer", 1, 1, node
)) != 0)
455 static int inline prom_getprop(phandle node
, const char *pname
,
456 void *value
, size_t valuelen
)
458 return call_prom("getprop", 4, 1, node
, ADDR(pname
),
459 (u32
)(unsigned long) value
, (u32
) valuelen
);
462 static int inline prom_getproplen(phandle node
, const char *pname
)
464 return call_prom("getproplen", 2, 1, node
, ADDR(pname
));
467 static void add_string(char **str
, const char *q
)
477 static char *tohex(unsigned int x
)
479 static char digits
[] = "0123456789abcdef";
480 static char result
[9];
487 result
[i
] = digits
[x
& 0xf];
489 } while (x
!= 0 && i
> 0);
493 static int __init
prom_setprop(phandle node
, const char *nodename
,
494 const char *pname
, void *value
, size_t valuelen
)
498 if (!(OF_WORKAROUNDS
& OF_WA_LONGTRAIL
))
499 return call_prom("setprop", 4, 1, node
, ADDR(pname
),
500 (u32
)(unsigned long) value
, (u32
) valuelen
);
502 /* gah... setprop doesn't work on longtrail, have to use interpret */
504 add_string(&p
, "dev");
505 add_string(&p
, nodename
);
506 add_string(&p
, tohex((u32
)(unsigned long) value
));
507 add_string(&p
, tohex(valuelen
));
508 add_string(&p
, tohex(ADDR(pname
)));
509 add_string(&p
, tohex(strlen(RELOC(pname
))));
510 add_string(&p
, "property");
512 return call_prom("interpret", 1, 1, (u32
)(unsigned long) cmd
);
515 /* We can't use the standard versions because of RELOC headaches. */
516 #define isxdigit(c) (('0' <= (c) && (c) <= '9') \
517 || ('a' <= (c) && (c) <= 'f') \
518 || ('A' <= (c) && (c) <= 'F'))
520 #define isdigit(c) ('0' <= (c) && (c) <= '9')
521 #define islower(c) ('a' <= (c) && (c) <= 'z')
522 #define toupper(c) (islower(c) ? ((c) - 'a' + 'A') : (c))
524 unsigned long prom_strtoul(const char *cp
, const char **endp
)
526 unsigned long result
= 0, base
= 10, value
;
531 if (toupper(*cp
) == 'X') {
537 while (isxdigit(*cp
) &&
538 (value
= isdigit(*cp
) ? *cp
- '0' : toupper(*cp
) - 'A' + 10) < base
) {
539 result
= result
* base
+ value
;
549 unsigned long prom_memparse(const char *ptr
, const char **retptr
)
551 unsigned long ret
= prom_strtoul(ptr
, retptr
);
555 * We can't use a switch here because GCC *may* generate a
556 * jump table which won't work, because we're not running at
557 * the address we're linked at.
559 if ('G' == **retptr
|| 'g' == **retptr
)
562 if ('M' == **retptr
|| 'm' == **retptr
)
565 if ('K' == **retptr
|| 'k' == **retptr
)
577 * Early parsing of the command line passed to the kernel, used for
578 * "mem=x" and the options that affect the iommu
580 static void __init
early_cmdline_parse(void)
582 struct prom_t
*_prom
= &RELOC(prom
);
588 RELOC(prom_cmd_line
[0]) = 0;
589 p
= RELOC(prom_cmd_line
);
590 if ((long)_prom
->chosen
> 0)
591 l
= prom_getprop(_prom
->chosen
, "bootargs", p
, COMMAND_LINE_SIZE
-1);
592 #ifdef CONFIG_CMDLINE
593 if (l
<= 0 || p
[0] == '\0') /* dbl check */
594 strlcpy(RELOC(prom_cmd_line
),
595 RELOC(CONFIG_CMDLINE
), sizeof(prom_cmd_line
));
596 #endif /* CONFIG_CMDLINE */
597 prom_printf("command line: %s\n", RELOC(prom_cmd_line
));
600 opt
= strstr(RELOC(prom_cmd_line
), RELOC("iommu="));
602 prom_printf("iommu opt is: %s\n", opt
);
604 while (*opt
&& *opt
== ' ')
606 if (!strncmp(opt
, RELOC("off"), 3))
607 RELOC(prom_iommu_off
) = 1;
608 else if (!strncmp(opt
, RELOC("force"), 5))
609 RELOC(prom_iommu_force_on
) = 1;
612 opt
= strstr(RELOC(prom_cmd_line
), RELOC("mem="));
615 RELOC(prom_memory_limit
) = prom_memparse(opt
, (const char **)&opt
);
617 /* Align to 16 MB == size of ppc64 large page */
618 RELOC(prom_memory_limit
) = ALIGN(RELOC(prom_memory_limit
), 0x1000000);
623 #ifdef CONFIG_PPC_PSERIES
625 * There are two methods for telling firmware what our capabilities are.
626 * Newer machines have an "ibm,client-architecture-support" method on the
627 * root node. For older machines, we have to call the "process-elf-header"
628 * method in the /packages/elf-loader node, passing it a fake 32-bit
629 * ELF header containing a couple of PT_NOTE sections that contain
630 * structures that contain various information.
634 * New method - extensible architecture description vector.
636 * Because the description vector contains a mix of byte and word
637 * values, we declare it as an unsigned char array, and use this
638 * macro to put word values in.
640 #define W(x) ((x) >> 24) & 0xff, ((x) >> 16) & 0xff, \
641 ((x) >> 8) & 0xff, (x) & 0xff
643 /* Option vector bits - generic bits in byte 1 */
644 #define OV_IGNORE 0x80 /* ignore this vector */
645 #define OV_CESSATION_POLICY 0x40 /* halt if unsupported option present*/
647 /* Option vector 1: processor architectures supported */
648 #define OV1_PPC_2_00 0x80 /* set if we support PowerPC 2.00 */
649 #define OV1_PPC_2_01 0x40 /* set if we support PowerPC 2.01 */
650 #define OV1_PPC_2_02 0x20 /* set if we support PowerPC 2.02 */
651 #define OV1_PPC_2_03 0x10 /* set if we support PowerPC 2.03 */
652 #define OV1_PPC_2_04 0x08 /* set if we support PowerPC 2.04 */
653 #define OV1_PPC_2_05 0x04 /* set if we support PowerPC 2.05 */
654 #define OV1_PPC_2_06 0x02 /* set if we support PowerPC 2.06 */
656 /* Option vector 2: Open Firmware options supported */
657 #define OV2_REAL_MODE 0x20 /* set if we want OF in real mode */
659 /* Option vector 3: processor options supported */
660 #define OV3_FP 0x80 /* floating point */
661 #define OV3_VMX 0x40 /* VMX/Altivec */
662 #define OV3_DFP 0x20 /* decimal FP */
664 /* Option vector 5: PAPR/OF options supported */
665 #define OV5_LPAR 0x80 /* logical partitioning supported */
666 #define OV5_SPLPAR 0x40 /* shared-processor LPAR supported */
667 /* ibm,dynamic-reconfiguration-memory property supported */
668 #define OV5_DRCONF_MEMORY 0x20
669 #define OV5_LARGE_PAGES 0x10 /* large pages supported */
670 #define OV5_DONATE_DEDICATE_CPU 0x02 /* donate dedicated CPU support */
671 /* PCIe/MSI support. Without MSI full PCIe is not supported */
672 #ifdef CONFIG_PCI_MSI
673 #define OV5_MSI 0x01 /* PCIe/MSI support */
676 #endif /* CONFIG_PCI_MSI */
677 #ifdef CONFIG_PPC_SMLPAR
678 #define OV5_CMO 0x80 /* Cooperative Memory Overcommitment */
682 #define OV5_TYPE1_AFFINITY 0x80 /* Type 1 NUMA affinity */
684 /* Option Vector 6: IBM PAPR hints */
685 #define OV6_LINUX 0x02 /* Linux is our OS */
688 * The architecture vector has an array of PVR mask/value pairs,
689 * followed by # option vectors - 1, followed by the option vectors.
691 static unsigned char ibm_architecture_vec
[] = {
692 W(0xfffe0000), W(0x003a0000), /* POWER5/POWER5+ */
693 W(0xffff0000), W(0x003e0000), /* POWER6 */
694 W(0xffff0000), W(0x003f0000), /* POWER7 */
695 W(0xffffffff), W(0x0f000003), /* all 2.06-compliant */
696 W(0xffffffff), W(0x0f000002), /* all 2.05-compliant */
697 W(0xfffffffe), W(0x0f000001), /* all 2.04-compliant and earlier */
698 6 - 1, /* 6 option vectors */
700 /* option vector 1: processor architectures supported */
702 0, /* don't ignore, don't halt */
703 OV1_PPC_2_00
| OV1_PPC_2_01
| OV1_PPC_2_02
| OV1_PPC_2_03
|
704 OV1_PPC_2_04
| OV1_PPC_2_05
| OV1_PPC_2_06
,
706 /* option vector 2: Open Firmware options supported */
710 W(0xffffffff), /* real_base */
711 W(0xffffffff), /* real_size */
712 W(0xffffffff), /* virt_base */
713 W(0xffffffff), /* virt_size */
714 W(0xffffffff), /* load_base */
715 W(64), /* 64MB min RMA */
716 W(0xffffffff), /* full client load */
717 0, /* min RMA percentage of total RAM */
718 48, /* max log_2(hash table size) */
720 /* option vector 3: processor options supported */
722 0, /* don't ignore, don't halt */
723 OV3_FP
| OV3_VMX
| OV3_DFP
,
725 /* option vector 4: IBM PAPR implementation */
729 /* option vector 5: PAPR/OF options */
731 0, /* don't ignore, don't halt */
732 OV5_LPAR
| OV5_SPLPAR
| OV5_LARGE_PAGES
| OV5_DRCONF_MEMORY
|
733 OV5_DONATE_DEDICATE_CPU
| OV5_MSI
,
740 /* WARNING: The offset of the "number of cores" field below
741 * must match by the macro below. Update the definition if
742 * the structure layout changes.
744 #define IBM_ARCH_VEC_NRCORES_OFFSET 100
745 W(NR_CPUS
), /* number of cores supported */
747 /* option vector 6: IBM PAPR hints */
755 /* Old method - ELF header with PT_NOTE sections */
756 static struct fake_elf
{
763 char name
[8]; /* "PowerPC" */
777 char name
[24]; /* "IBM,RPA-Client-Config" */
791 .e_ident
= { 0x7f, 'E', 'L', 'F',
792 ELFCLASS32
, ELFDATA2MSB
, EV_CURRENT
},
793 .e_type
= ET_EXEC
, /* yeah right */
795 .e_version
= EV_CURRENT
,
796 .e_phoff
= offsetof(struct fake_elf
, phdr
),
797 .e_phentsize
= sizeof(Elf32_Phdr
),
803 .p_offset
= offsetof(struct fake_elf
, chrpnote
),
804 .p_filesz
= sizeof(struct chrpnote
)
807 .p_offset
= offsetof(struct fake_elf
, rpanote
),
808 .p_filesz
= sizeof(struct rpanote
)
812 .namesz
= sizeof("PowerPC"),
813 .descsz
= sizeof(struct chrpdesc
),
817 .real_mode
= ~0U, /* ~0 means "don't care" */
826 .namesz
= sizeof("IBM,RPA-Client-Config"),
827 .descsz
= sizeof(struct rpadesc
),
829 .name
= "IBM,RPA-Client-Config",
832 .min_rmo_size
= 64, /* in megabytes */
833 .min_rmo_percent
= 0,
834 .max_pft_size
= 48, /* 2^48 bytes max PFT size */
842 static int __init
prom_count_smt_threads(void)
848 /* Pick up th first CPU node we can find */
849 for (node
= 0; prom_next_node(&node
); ) {
851 prom_getprop(node
, "device_type", type
, sizeof(type
));
853 if (strcmp(type
, RELOC("cpu")))
856 * There is an entry for each smt thread, each entry being
857 * 4 bytes long. All cpus should have the same number of
858 * smt threads, so return after finding the first.
860 plen
= prom_getproplen(node
, "ibm,ppc-interrupt-server#s");
861 if (plen
== PROM_ERROR
)
864 prom_debug("Found %lu smt threads per core\n", (unsigned long)plen
);
867 if (plen
< 1 || plen
> 64) {
868 prom_printf("Threads per core %lu out of bounds, assuming 1\n",
869 (unsigned long)plen
);
874 prom_debug("No threads found, assuming 1 per core\n");
881 static void __init
prom_send_capabilities(void)
883 ihandle elfloader
, root
;
887 root
= call_prom("open", 1, 1, ADDR("/"));
889 /* We need to tell the FW about the number of cores we support.
891 * To do that, we count the number of threads on the first core
892 * (we assume this is the same for all cores) and use it to
895 cores
= (u32
*)PTRRELOC(&ibm_architecture_vec
[IBM_ARCH_VEC_NRCORES_OFFSET
]);
896 if (*cores
!= NR_CPUS
) {
897 prom_printf("WARNING ! "
898 "ibm_architecture_vec structure inconsistent: %lu!\n",
901 *cores
= DIV_ROUND_UP(NR_CPUS
, prom_count_smt_threads());
902 prom_printf("Max number of cores passed to firmware: %lu (NR_CPUS = %lu)\n",
906 /* try calling the ibm,client-architecture-support method */
907 prom_printf("Calling ibm,client-architecture-support...");
908 if (call_prom_ret("call-method", 3, 2, &ret
,
909 ADDR("ibm,client-architecture-support"),
911 ADDR(ibm_architecture_vec
)) == 0) {
912 /* the call exists... */
914 prom_printf("\nWARNING: ibm,client-architecture"
915 "-support call FAILED!\n");
916 call_prom("close", 1, 0, root
);
917 prom_printf(" done\n");
920 call_prom("close", 1, 0, root
);
921 prom_printf(" not implemented\n");
924 /* no ibm,client-architecture-support call, try the old way */
925 elfloader
= call_prom("open", 1, 1, ADDR("/packages/elf-loader"));
926 if (elfloader
== 0) {
927 prom_printf("couldn't open /packages/elf-loader\n");
930 call_prom("call-method", 3, 1, ADDR("process-elf-header"),
931 elfloader
, ADDR(&fake_elf
));
932 call_prom("close", 1, 0, elfloader
);
937 * Memory allocation strategy... our layout is normally:
939 * at 14Mb or more we have vmlinux, then a gap and initrd. In some
940 * rare cases, initrd might end up being before the kernel though.
941 * We assume this won't override the final kernel at 0, we have no
942 * provision to handle that in this version, but it should hopefully
945 * alloc_top is set to the top of RMO, eventually shrink down if the
948 * alloc_bottom is set to the top of kernel/initrd
950 * from there, allocations are done this way : rtas is allocated
951 * topmost, and the device-tree is allocated from the bottom. We try
952 * to grow the device-tree allocation as we progress. If we can't,
953 * then we fail, we don't currently have a facility to restart
954 * elsewhere, but that shouldn't be necessary.
956 * Note that calls to reserve_mem have to be done explicitly, memory
957 * allocated with either alloc_up or alloc_down isn't automatically
963 * Allocates memory in the RMO upward from the kernel/initrd
965 * When align is 0, this is a special case, it means to allocate in place
966 * at the current location of alloc_bottom or fail (that is basically
967 * extending the previous allocation). Used for the device-tree flattening
969 static unsigned long __init
alloc_up(unsigned long size
, unsigned long align
)
971 unsigned long base
= RELOC(alloc_bottom
);
972 unsigned long addr
= 0;
975 base
= _ALIGN_UP(base
, align
);
976 prom_debug("alloc_up(%x, %x)\n", size
, align
);
977 if (RELOC(ram_top
) == 0)
978 prom_panic("alloc_up() called with mem not initialized\n");
981 base
= _ALIGN_UP(RELOC(alloc_bottom
), align
);
983 base
= RELOC(alloc_bottom
);
985 for(; (base
+ size
) <= RELOC(alloc_top
);
986 base
= _ALIGN_UP(base
+ 0x100000, align
)) {
987 prom_debug(" trying: 0x%x\n\r", base
);
988 addr
= (unsigned long)prom_claim(base
, size
, 0);
989 if (addr
!= PROM_ERROR
&& addr
!= 0)
997 RELOC(alloc_bottom
) = addr
;
999 prom_debug(" -> %x\n", addr
);
1000 prom_debug(" alloc_bottom : %x\n", RELOC(alloc_bottom
));
1001 prom_debug(" alloc_top : %x\n", RELOC(alloc_top
));
1002 prom_debug(" alloc_top_hi : %x\n", RELOC(alloc_top_high
));
1003 prom_debug(" rmo_top : %x\n", RELOC(rmo_top
));
1004 prom_debug(" ram_top : %x\n", RELOC(ram_top
));
1010 * Allocates memory downward, either from top of RMO, or if highmem
1011 * is set, from the top of RAM. Note that this one doesn't handle
1012 * failures. It does claim memory if highmem is not set.
1014 static unsigned long __init
alloc_down(unsigned long size
, unsigned long align
,
1017 unsigned long base
, addr
= 0;
1019 prom_debug("alloc_down(%x, %x, %s)\n", size
, align
,
1020 highmem
? RELOC("(high)") : RELOC("(low)"));
1021 if (RELOC(ram_top
) == 0)
1022 prom_panic("alloc_down() called with mem not initialized\n");
1025 /* Carve out storage for the TCE table. */
1026 addr
= _ALIGN_DOWN(RELOC(alloc_top_high
) - size
, align
);
1027 if (addr
<= RELOC(alloc_bottom
))
1029 /* Will we bump into the RMO ? If yes, check out that we
1030 * didn't overlap existing allocations there, if we did,
1031 * we are dead, we must be the first in town !
1033 if (addr
< RELOC(rmo_top
)) {
1034 /* Good, we are first */
1035 if (RELOC(alloc_top
) == RELOC(rmo_top
))
1036 RELOC(alloc_top
) = RELOC(rmo_top
) = addr
;
1040 RELOC(alloc_top_high
) = addr
;
1044 base
= _ALIGN_DOWN(RELOC(alloc_top
) - size
, align
);
1045 for (; base
> RELOC(alloc_bottom
);
1046 base
= _ALIGN_DOWN(base
- 0x100000, align
)) {
1047 prom_debug(" trying: 0x%x\n\r", base
);
1048 addr
= (unsigned long)prom_claim(base
, size
, 0);
1049 if (addr
!= PROM_ERROR
&& addr
!= 0)
1055 RELOC(alloc_top
) = addr
;
1058 prom_debug(" -> %x\n", addr
);
1059 prom_debug(" alloc_bottom : %x\n", RELOC(alloc_bottom
));
1060 prom_debug(" alloc_top : %x\n", RELOC(alloc_top
));
1061 prom_debug(" alloc_top_hi : %x\n", RELOC(alloc_top_high
));
1062 prom_debug(" rmo_top : %x\n", RELOC(rmo_top
));
1063 prom_debug(" ram_top : %x\n", RELOC(ram_top
));
1069 * Parse a "reg" cell
1071 static unsigned long __init
prom_next_cell(int s
, cell_t
**cellp
)
1074 unsigned long r
= 0;
1076 /* Ignore more than 2 cells */
1077 while (s
> sizeof(unsigned long) / 4) {
1092 static void __init
reserve_mem(u64 base
, u64 size
)
1094 u64 top
= base
+ size
;
1095 unsigned long cnt
= RELOC(mem_reserve_cnt
);
1100 /* We need to always keep one empty entry so that we
1101 * have our terminator with "size" set to 0 since we are
1102 * dumb and just copy this entire array to the boot params
1104 base
= _ALIGN_DOWN(base
, PAGE_SIZE
);
1105 top
= _ALIGN_UP(top
, PAGE_SIZE
);
1108 if (cnt
>= (MEM_RESERVE_MAP_SIZE
- 1))
1109 prom_panic("Memory reserve map exhausted !\n");
1110 RELOC(mem_reserve_map
)[cnt
].base
= base
;
1111 RELOC(mem_reserve_map
)[cnt
].size
= size
;
1112 RELOC(mem_reserve_cnt
) = cnt
+ 1;
1116 * Initialize memory allocation mechanism, parse "memory" nodes and
1117 * obtain that way the top of memory and RMO to setup out local allocator
1119 static void __init
prom_init_mem(void)
1122 char *path
, type
[64];
1125 struct prom_t
*_prom
= &RELOC(prom
);
1129 * We iterate the memory nodes to find
1130 * 1) top of RMO (first node)
1134 prom_getprop(_prom
->root
, "#address-cells", &rac
, sizeof(rac
));
1136 prom_getprop(_prom
->root
, "#size-cells", &rsc
, sizeof(rsc
));
1137 prom_debug("root_addr_cells: %x\n", (unsigned long) rac
);
1138 prom_debug("root_size_cells: %x\n", (unsigned long) rsc
);
1140 prom_debug("scanning memory:\n");
1141 path
= RELOC(prom_scratch
);
1143 for (node
= 0; prom_next_node(&node
); ) {
1145 prom_getprop(node
, "device_type", type
, sizeof(type
));
1149 * CHRP Longtrail machines have no device_type
1150 * on the memory node, so check the name instead...
1152 prom_getprop(node
, "name", type
, sizeof(type
));
1154 if (strcmp(type
, RELOC("memory")))
1157 plen
= prom_getprop(node
, "reg", RELOC(regbuf
), sizeof(regbuf
));
1158 if (plen
> sizeof(regbuf
)) {
1159 prom_printf("memory node too large for buffer !\n");
1160 plen
= sizeof(regbuf
);
1163 endp
= p
+ (plen
/ sizeof(cell_t
));
1166 memset(path
, 0, PROM_SCRATCH_SIZE
);
1167 call_prom("package-to-path", 3, 1, node
, path
, PROM_SCRATCH_SIZE
-1);
1168 prom_debug(" node %s :\n", path
);
1169 #endif /* DEBUG_PROM */
1171 while ((endp
- p
) >= (rac
+ rsc
)) {
1172 unsigned long base
, size
;
1174 base
= prom_next_cell(rac
, &p
);
1175 size
= prom_next_cell(rsc
, &p
);
1179 prom_debug(" %x %x\n", base
, size
);
1180 if (base
== 0 && (RELOC(of_platform
) & PLATFORM_LPAR
))
1181 RELOC(rmo_top
) = size
;
1182 if ((base
+ size
) > RELOC(ram_top
))
1183 RELOC(ram_top
) = base
+ size
;
1187 RELOC(alloc_bottom
) = PAGE_ALIGN((unsigned long)&RELOC(_end
) + 0x4000);
1189 /* Check if we have an initrd after the kernel, if we do move our bottom
1192 if (RELOC(prom_initrd_start
)) {
1193 if (RELOC(prom_initrd_end
) > RELOC(alloc_bottom
))
1194 RELOC(alloc_bottom
) = PAGE_ALIGN(RELOC(prom_initrd_end
));
1198 * If prom_memory_limit is set we reduce the upper limits *except* for
1199 * alloc_top_high. This must be the real top of RAM so we can put
1203 RELOC(alloc_top_high
) = RELOC(ram_top
);
1205 if (RELOC(prom_memory_limit
)) {
1206 if (RELOC(prom_memory_limit
) <= RELOC(alloc_bottom
)) {
1207 prom_printf("Ignoring mem=%x <= alloc_bottom.\n",
1208 RELOC(prom_memory_limit
));
1209 RELOC(prom_memory_limit
) = 0;
1210 } else if (RELOC(prom_memory_limit
) >= RELOC(ram_top
)) {
1211 prom_printf("Ignoring mem=%x >= ram_top.\n",
1212 RELOC(prom_memory_limit
));
1213 RELOC(prom_memory_limit
) = 0;
1215 RELOC(ram_top
) = RELOC(prom_memory_limit
);
1216 RELOC(rmo_top
) = min(RELOC(rmo_top
), RELOC(prom_memory_limit
));
1220 if (!RELOC(rmo_top
))
1221 RELOC(rmo_top
) = RELOC(ram_top
);
1222 RELOC(rmo_top
) = min(0x30000000ul
, RELOC(rmo_top
));
1223 RELOC(alloc_top
) = RELOC(rmo_top
);
1224 RELOC(alloc_top_high
) = RELOC(ram_top
);
1226 prom_printf("memory layout at init:\n");
1227 prom_printf(" memory_limit : %x (16 MB aligned)\n", RELOC(prom_memory_limit
));
1228 prom_printf(" alloc_bottom : %x\n", RELOC(alloc_bottom
));
1229 prom_printf(" alloc_top : %x\n", RELOC(alloc_top
));
1230 prom_printf(" alloc_top_hi : %x\n", RELOC(alloc_top_high
));
1231 prom_printf(" rmo_top : %x\n", RELOC(rmo_top
));
1232 prom_printf(" ram_top : %x\n", RELOC(ram_top
));
1237 * Allocate room for and instantiate RTAS
1239 static void __init
prom_instantiate_rtas(void)
1243 u32 base
, entry
= 0;
1246 prom_debug("prom_instantiate_rtas: start...\n");
1248 rtas_node
= call_prom("finddevice", 1, 1, ADDR("/rtas"));
1249 prom_debug("rtas_node: %x\n", rtas_node
);
1250 if (!PHANDLE_VALID(rtas_node
))
1253 prom_getprop(rtas_node
, "rtas-size", &size
, sizeof(size
));
1257 base
= alloc_down(size
, PAGE_SIZE
, 0);
1259 prom_printf("RTAS allocation failed !\n");
1263 rtas_inst
= call_prom("open", 1, 1, ADDR("/rtas"));
1264 if (!IHANDLE_VALID(rtas_inst
)) {
1265 prom_printf("opening rtas package failed (%x)\n", rtas_inst
);
1269 prom_printf("instantiating rtas at 0x%x...", base
);
1271 if (call_prom_ret("call-method", 3, 2, &entry
,
1272 ADDR("instantiate-rtas"),
1273 rtas_inst
, base
) != 0
1275 prom_printf(" failed\n");
1278 prom_printf(" done\n");
1280 reserve_mem(base
, size
);
1282 prom_setprop(rtas_node
, "/rtas", "linux,rtas-base",
1283 &base
, sizeof(base
));
1284 prom_setprop(rtas_node
, "/rtas", "linux,rtas-entry",
1285 &entry
, sizeof(entry
));
1287 prom_debug("rtas base = 0x%x\n", base
);
1288 prom_debug("rtas entry = 0x%x\n", entry
);
1289 prom_debug("rtas size = 0x%x\n", (long)size
);
1291 prom_debug("prom_instantiate_rtas: end...\n");
1296 * Allocate room for and initialize TCE tables
1298 static void __init
prom_initialize_tce_table(void)
1302 char compatible
[64], type
[64], model
[64];
1303 char *path
= RELOC(prom_scratch
);
1305 u32 minalign
, minsize
;
1306 u64 tce_entry
, *tce_entryp
;
1307 u64 local_alloc_top
, local_alloc_bottom
;
1310 if (RELOC(prom_iommu_off
))
1313 prom_debug("starting prom_initialize_tce_table\n");
1315 /* Cache current top of allocs so we reserve a single block */
1316 local_alloc_top
= RELOC(alloc_top_high
);
1317 local_alloc_bottom
= local_alloc_top
;
1319 /* Search all nodes looking for PHBs. */
1320 for (node
= 0; prom_next_node(&node
); ) {
1324 prom_getprop(node
, "compatible",
1325 compatible
, sizeof(compatible
));
1326 prom_getprop(node
, "device_type", type
, sizeof(type
));
1327 prom_getprop(node
, "model", model
, sizeof(model
));
1329 if ((type
[0] == 0) || (strstr(type
, RELOC("pci")) == NULL
))
1332 /* Keep the old logic intact to avoid regression. */
1333 if (compatible
[0] != 0) {
1334 if ((strstr(compatible
, RELOC("python")) == NULL
) &&
1335 (strstr(compatible
, RELOC("Speedwagon")) == NULL
) &&
1336 (strstr(compatible
, RELOC("Winnipeg")) == NULL
))
1338 } else if (model
[0] != 0) {
1339 if ((strstr(model
, RELOC("ython")) == NULL
) &&
1340 (strstr(model
, RELOC("peedwagon")) == NULL
) &&
1341 (strstr(model
, RELOC("innipeg")) == NULL
))
1345 if (prom_getprop(node
, "tce-table-minalign", &minalign
,
1346 sizeof(minalign
)) == PROM_ERROR
)
1348 if (prom_getprop(node
, "tce-table-minsize", &minsize
,
1349 sizeof(minsize
)) == PROM_ERROR
)
1350 minsize
= 4UL << 20;
1353 * Even though we read what OF wants, we just set the table
1354 * size to 4 MB. This is enough to map 2GB of PCI DMA space.
1355 * By doing this, we avoid the pitfalls of trying to DMA to
1356 * MMIO space and the DMA alias hole.
1358 * On POWER4, firmware sets the TCE region by assuming
1359 * each TCE table is 8MB. Using this memory for anything
1360 * else will impact performance, so we always allocate 8MB.
1363 if (__is_processor(PV_POWER4
) || __is_processor(PV_POWER4p
))
1364 minsize
= 8UL << 20;
1366 minsize
= 4UL << 20;
1368 /* Align to the greater of the align or size */
1369 align
= max(minalign
, minsize
);
1370 base
= alloc_down(minsize
, align
, 1);
1372 prom_panic("ERROR, cannot find space for TCE table.\n");
1373 if (base
< local_alloc_bottom
)
1374 local_alloc_bottom
= base
;
1376 /* It seems OF doesn't null-terminate the path :-( */
1377 memset(path
, 0, PROM_SCRATCH_SIZE
);
1378 /* Call OF to setup the TCE hardware */
1379 if (call_prom("package-to-path", 3, 1, node
,
1380 path
, PROM_SCRATCH_SIZE
-1) == PROM_ERROR
) {
1381 prom_printf("package-to-path failed\n");
1384 /* Save away the TCE table attributes for later use. */
1385 prom_setprop(node
, path
, "linux,tce-base", &base
, sizeof(base
));
1386 prom_setprop(node
, path
, "linux,tce-size", &minsize
, sizeof(minsize
));
1388 prom_debug("TCE table: %s\n", path
);
1389 prom_debug("\tnode = 0x%x\n", node
);
1390 prom_debug("\tbase = 0x%x\n", base
);
1391 prom_debug("\tsize = 0x%x\n", minsize
);
1393 /* Initialize the table to have a one-to-one mapping
1394 * over the allocated size.
1396 tce_entryp
= (u64
*)base
;
1397 for (i
= 0; i
< (minsize
>> 3) ;tce_entryp
++, i
++) {
1398 tce_entry
= (i
<< PAGE_SHIFT
);
1400 *tce_entryp
= tce_entry
;
1403 prom_printf("opening PHB %s", path
);
1404 phb_node
= call_prom("open", 1, 1, path
);
1406 prom_printf("... failed\n");
1408 prom_printf("... done\n");
1410 call_prom("call-method", 6, 0, ADDR("set-64-bit-addressing"),
1411 phb_node
, -1, minsize
,
1412 (u32
) base
, (u32
) (base
>> 32));
1413 call_prom("close", 1, 0, phb_node
);
1416 reserve_mem(local_alloc_bottom
, local_alloc_top
- local_alloc_bottom
);
1418 /* These are only really needed if there is a memory limit in
1419 * effect, but we don't know so export them always. */
1420 RELOC(prom_tce_alloc_start
) = local_alloc_bottom
;
1421 RELOC(prom_tce_alloc_end
) = local_alloc_top
;
1423 /* Flag the first invalid entry */
1424 prom_debug("ending prom_initialize_tce_table\n");
1429 * With CHRP SMP we need to use the OF to start the other processors.
1430 * We can't wait until smp_boot_cpus (the OF is trashed by then)
1431 * so we have to put the processors into a holding pattern controlled
1432 * by the kernel (not OF) before we destroy the OF.
1434 * This uses a chunk of low memory, puts some holding pattern
1435 * code there and sends the other processors off to there until
1436 * smp_boot_cpus tells them to do something. The holding pattern
1437 * checks that address until its cpu # is there, when it is that
1438 * cpu jumps to __secondary_start(). smp_boot_cpus() takes care
1439 * of setting those values.
1441 * We also use physical address 0x4 here to tell when a cpu
1442 * is in its holding pattern code.
1447 * We want to reference the copy of __secondary_hold_* in the
1448 * 0 - 0x100 address range
1450 #define LOW_ADDR(x) (((unsigned long) &(x)) & 0xff)
1452 static void __init
prom_hold_cpus(void)
1458 struct prom_t
*_prom
= &RELOC(prom
);
1459 unsigned long *spinloop
1460 = (void *) LOW_ADDR(__secondary_hold_spinloop
);
1461 unsigned long *acknowledge
1462 = (void *) LOW_ADDR(__secondary_hold_acknowledge
);
1463 unsigned long secondary_hold
= LOW_ADDR(__secondary_hold
);
1465 prom_debug("prom_hold_cpus: start...\n");
1466 prom_debug(" 1) spinloop = 0x%x\n", (unsigned long)spinloop
);
1467 prom_debug(" 1) *spinloop = 0x%x\n", *spinloop
);
1468 prom_debug(" 1) acknowledge = 0x%x\n",
1469 (unsigned long)acknowledge
);
1470 prom_debug(" 1) *acknowledge = 0x%x\n", *acknowledge
);
1471 prom_debug(" 1) secondary_hold = 0x%x\n", secondary_hold
);
1473 /* Set the common spinloop variable, so all of the secondary cpus
1474 * will block when they are awakened from their OF spinloop.
1475 * This must occur for both SMP and non SMP kernels, since OF will
1476 * be trashed when we move the kernel.
1481 for (node
= 0; prom_next_node(&node
); ) {
1483 prom_getprop(node
, "device_type", type
, sizeof(type
));
1484 if (strcmp(type
, RELOC("cpu")) != 0)
1487 /* Skip non-configured cpus. */
1488 if (prom_getprop(node
, "status", type
, sizeof(type
)) > 0)
1489 if (strcmp(type
, RELOC("okay")) != 0)
1493 prom_getprop(node
, "reg", ®
, sizeof(reg
));
1495 prom_debug("cpu hw idx = %lu\n", reg
);
1497 /* Init the acknowledge var which will be reset by
1498 * the secondary cpu when it awakens from its OF
1501 *acknowledge
= (unsigned long)-1;
1503 if (reg
!= _prom
->cpu
) {
1504 /* Primary Thread of non-boot cpu */
1505 prom_printf("starting cpu hw idx %lu... ", reg
);
1506 call_prom("start-cpu", 3, 0, node
,
1507 secondary_hold
, reg
);
1509 for (i
= 0; (i
< 100000000) &&
1510 (*acknowledge
== ((unsigned long)-1)); i
++ )
1513 if (*acknowledge
== reg
)
1514 prom_printf("done\n");
1516 prom_printf("failed: %x\n", *acknowledge
);
1520 prom_printf("boot cpu hw idx %lu\n", reg
);
1521 #endif /* CONFIG_SMP */
1524 prom_debug("prom_hold_cpus: end...\n");
1528 static void __init
prom_init_client_services(unsigned long pp
)
1530 struct prom_t
*_prom
= &RELOC(prom
);
1532 /* Get a handle to the prom entry point before anything else */
1533 RELOC(prom_entry
) = pp
;
1535 /* get a handle for the stdout device */
1536 _prom
->chosen
= call_prom("finddevice", 1, 1, ADDR("/chosen"));
1537 if (!PHANDLE_VALID(_prom
->chosen
))
1538 prom_panic("cannot find chosen"); /* msg won't be printed :( */
1540 /* get device tree root */
1541 _prom
->root
= call_prom("finddevice", 1, 1, ADDR("/"));
1542 if (!PHANDLE_VALID(_prom
->root
))
1543 prom_panic("cannot find device tree root"); /* msg won't be printed :( */
1549 static void __init
prom_find_mmu(void)
1551 struct prom_t
*_prom
= &RELOC(prom
);
1555 oprom
= call_prom("finddevice", 1, 1, ADDR("/openprom"));
1556 if (!PHANDLE_VALID(oprom
))
1558 if (prom_getprop(oprom
, "model", version
, sizeof(version
)) <= 0)
1560 version
[sizeof(version
) - 1] = 0;
1561 if (strcmp(version
, "Open Firmware, 1.0.5") == 0)
1562 of_workarounds
= OF_WA_CLAIM
;
1563 else if (strncmp(version
, "FirmWorks,3.", 12) == 0) {
1564 of_workarounds
= OF_WA_CLAIM
| OF_WA_LONGTRAIL
;
1565 call_prom("interpret", 1, 1, "dev /memory 0 to allow-reclaim");
1568 _prom
->memory
= call_prom("open", 1, 1, ADDR("/memory"));
1569 prom_getprop(_prom
->chosen
, "mmu", &_prom
->mmumap
,
1570 sizeof(_prom
->mmumap
));
1571 if (!IHANDLE_VALID(_prom
->memory
) || !IHANDLE_VALID(_prom
->mmumap
))
1572 of_workarounds
&= ~OF_WA_CLAIM
; /* hmmm */
1575 #define prom_find_mmu()
1578 static void __init
prom_init_stdout(void)
1580 struct prom_t
*_prom
= &RELOC(prom
);
1581 char *path
= RELOC(of_stdout_device
);
1585 if (prom_getprop(_prom
->chosen
, "stdout", &val
, sizeof(val
)) <= 0)
1586 prom_panic("cannot find stdout");
1588 _prom
->stdout
= val
;
1590 /* Get the full OF pathname of the stdout device */
1591 memset(path
, 0, 256);
1592 call_prom("instance-to-path", 3, 1, _prom
->stdout
, path
, 255);
1593 val
= call_prom("instance-to-package", 1, 1, _prom
->stdout
);
1594 prom_setprop(_prom
->chosen
, "/chosen", "linux,stdout-package",
1596 prom_printf("OF stdout device is: %s\n", RELOC(of_stdout_device
));
1597 prom_setprop(_prom
->chosen
, "/chosen", "linux,stdout-path",
1598 path
, strlen(path
) + 1);
1600 /* If it's a display, note it */
1601 memset(type
, 0, sizeof(type
));
1602 prom_getprop(val
, "device_type", type
, sizeof(type
));
1603 if (strcmp(type
, RELOC("display")) == 0)
1604 prom_setprop(val
, path
, "linux,boot-display", NULL
, 0);
1607 static void __init
prom_close_stdin(void)
1609 struct prom_t
*_prom
= &RELOC(prom
);
1612 if (prom_getprop(_prom
->chosen
, "stdin", &val
, sizeof(val
)) > 0)
1613 call_prom("close", 1, 0, val
);
1616 static int __init
prom_find_machine_type(void)
1618 struct prom_t
*_prom
= &RELOC(prom
);
1626 /* Look for a PowerMac */
1627 len
= prom_getprop(_prom
->root
, "compatible",
1628 compat
, sizeof(compat
)-1);
1632 char *p
= &compat
[i
];
1636 if (strstr(p
, RELOC("Power Macintosh")) ||
1637 strstr(p
, RELOC("MacRISC")))
1638 return PLATFORM_POWERMAC
;
1640 /* We must make sure we don't detect the IBM Cell
1641 * blades as pSeries due to some firmware issues,
1644 if (strstr(p
, RELOC("IBM,CBEA")) ||
1645 strstr(p
, RELOC("IBM,CPBW-1.0")))
1646 return PLATFORM_GENERIC
;
1647 #endif /* CONFIG_PPC64 */
1652 /* If not a mac, try to figure out if it's an IBM pSeries or any other
1653 * PAPR compliant platform. We assume it is if :
1654 * - /device_type is "chrp" (please, do NOT use that for future
1658 len
= prom_getprop(_prom
->root
, "device_type",
1659 compat
, sizeof(compat
)-1);
1661 return PLATFORM_GENERIC
;
1662 if (strcmp(compat
, RELOC("chrp")))
1663 return PLATFORM_GENERIC
;
1665 /* Default to pSeries. We need to know if we are running LPAR */
1666 rtas
= call_prom("finddevice", 1, 1, ADDR("/rtas"));
1667 if (!PHANDLE_VALID(rtas
))
1668 return PLATFORM_GENERIC
;
1669 x
= prom_getproplen(rtas
, "ibm,hypertas-functions");
1670 if (x
!= PROM_ERROR
) {
1671 prom_debug("Hypertas detected, assuming LPAR !\n");
1672 return PLATFORM_PSERIES_LPAR
;
1674 return PLATFORM_PSERIES
;
1676 return PLATFORM_GENERIC
;
1680 static int __init
prom_set_color(ihandle ih
, int i
, int r
, int g
, int b
)
1682 return call_prom("call-method", 6, 1, ADDR("color!"), ih
, i
, b
, g
, r
);
1686 * If we have a display that we don't know how to drive,
1687 * we will want to try to execute OF's open method for it
1688 * later. However, OF will probably fall over if we do that
1689 * we've taken over the MMU.
1690 * So we check whether we will need to open the display,
1691 * and if so, open it now.
1693 static void __init
prom_check_displays(void)
1695 char type
[16], *path
;
1700 static unsigned char default_colors
[] = {
1718 const unsigned char *clut
;
1720 prom_debug("Looking for displays\n");
1721 for (node
= 0; prom_next_node(&node
); ) {
1722 memset(type
, 0, sizeof(type
));
1723 prom_getprop(node
, "device_type", type
, sizeof(type
));
1724 if (strcmp(type
, RELOC("display")) != 0)
1727 /* It seems OF doesn't null-terminate the path :-( */
1728 path
= RELOC(prom_scratch
);
1729 memset(path
, 0, PROM_SCRATCH_SIZE
);
1732 * leave some room at the end of the path for appending extra
1735 if (call_prom("package-to-path", 3, 1, node
, path
,
1736 PROM_SCRATCH_SIZE
-10) == PROM_ERROR
)
1738 prom_printf("found display : %s, opening... ", path
);
1740 ih
= call_prom("open", 1, 1, path
);
1742 prom_printf("failed\n");
1747 prom_printf("done\n");
1748 prom_setprop(node
, path
, "linux,opened", NULL
, 0);
1750 /* Setup a usable color table when the appropriate
1751 * method is available. Should update this to set-colors */
1752 clut
= RELOC(default_colors
);
1753 for (i
= 0; i
< 32; i
++, clut
+= 3)
1754 if (prom_set_color(ih
, i
, clut
[0], clut
[1],
1758 #ifdef CONFIG_LOGO_LINUX_CLUT224
1759 clut
= PTRRELOC(RELOC(logo_linux_clut224
.clut
));
1760 for (i
= 0; i
< RELOC(logo_linux_clut224
.clutsize
); i
++, clut
+= 3)
1761 if (prom_set_color(ih
, i
+ 32, clut
[0], clut
[1],
1764 #endif /* CONFIG_LOGO_LINUX_CLUT224 */
1769 /* Return (relocated) pointer to this much memory: moves initrd if reqd. */
1770 static void __init
*make_room(unsigned long *mem_start
, unsigned long *mem_end
,
1771 unsigned long needed
, unsigned long align
)
1775 *mem_start
= _ALIGN(*mem_start
, align
);
1776 while ((*mem_start
+ needed
) > *mem_end
) {
1777 unsigned long room
, chunk
;
1779 prom_debug("Chunk exhausted, claiming more at %x...\n",
1780 RELOC(alloc_bottom
));
1781 room
= RELOC(alloc_top
) - RELOC(alloc_bottom
);
1782 if (room
> DEVTREE_CHUNK_SIZE
)
1783 room
= DEVTREE_CHUNK_SIZE
;
1784 if (room
< PAGE_SIZE
)
1785 prom_panic("No memory for flatten_device_tree (no room)");
1786 chunk
= alloc_up(room
, 0);
1788 prom_panic("No memory for flatten_device_tree (claim failed)");
1789 *mem_end
= RELOC(alloc_top
);
1792 ret
= (void *)*mem_start
;
1793 *mem_start
+= needed
;
1798 #define dt_push_token(token, mem_start, mem_end) \
1799 do { *((u32 *)make_room(mem_start, mem_end, 4, 4)) = token; } while(0)
1801 static unsigned long __init
dt_find_string(char *str
)
1805 s
= os
= (char *)RELOC(dt_string_start
);
1807 while (s
< (char *)RELOC(dt_string_end
)) {
1808 if (strcmp(s
, str
) == 0)
1816 * The Open Firmware 1275 specification states properties must be 31 bytes or
1817 * less, however not all firmwares obey this. Make it 64 bytes to be safe.
1819 #define MAX_PROPERTY_NAME 64
1821 static void __init
scan_dt_build_strings(phandle node
,
1822 unsigned long *mem_start
,
1823 unsigned long *mem_end
)
1825 char *prev_name
, *namep
, *sstart
;
1829 sstart
= (char *)RELOC(dt_string_start
);
1831 /* get and store all property names */
1832 prev_name
= RELOC("");
1834 /* 64 is max len of name including nul. */
1835 namep
= make_room(mem_start
, mem_end
, MAX_PROPERTY_NAME
, 1);
1836 if (call_prom("nextprop", 3, 1, node
, prev_name
, namep
) != 1) {
1837 /* No more nodes: unwind alloc */
1838 *mem_start
= (unsigned long)namep
;
1843 if (strcmp(namep
, RELOC("name")) == 0) {
1844 *mem_start
= (unsigned long)namep
;
1845 prev_name
= RELOC("name");
1848 /* get/create string entry */
1849 soff
= dt_find_string(namep
);
1851 *mem_start
= (unsigned long)namep
;
1852 namep
= sstart
+ soff
;
1854 /* Trim off some if we can */
1855 *mem_start
= (unsigned long)namep
+ strlen(namep
) + 1;
1856 RELOC(dt_string_end
) = *mem_start
;
1861 /* do all our children */
1862 child
= call_prom("child", 1, 1, node
);
1863 while (child
!= 0) {
1864 scan_dt_build_strings(child
, mem_start
, mem_end
);
1865 child
= call_prom("peer", 1, 1, child
);
1869 static void __init
scan_dt_build_struct(phandle node
, unsigned long *mem_start
,
1870 unsigned long *mem_end
)
1873 char *namep
, *prev_name
, *sstart
, *p
, *ep
, *lp
, *path
;
1875 unsigned char *valp
;
1876 static char pname
[MAX_PROPERTY_NAME
];
1879 dt_push_token(OF_DT_BEGIN_NODE
, mem_start
, mem_end
);
1881 /* get the node's full name */
1882 namep
= (char *)*mem_start
;
1883 room
= *mem_end
- *mem_start
;
1886 l
= call_prom("package-to-path", 3, 1, node
, namep
, room
);
1888 /* Didn't fit? Get more room. */
1890 if (l
>= *mem_end
- *mem_start
)
1891 namep
= make_room(mem_start
, mem_end
, l
+1, 1);
1892 call_prom("package-to-path", 3, 1, node
, namep
, l
);
1896 /* Fixup an Apple bug where they have bogus \0 chars in the
1897 * middle of the path in some properties, and extract
1898 * the unit name (everything after the last '/').
1900 for (lp
= p
= namep
, ep
= namep
+ l
; p
< ep
; p
++) {
1907 *mem_start
= _ALIGN((unsigned long)lp
+ 1, 4);
1910 /* get it again for debugging */
1911 path
= RELOC(prom_scratch
);
1912 memset(path
, 0, PROM_SCRATCH_SIZE
);
1913 call_prom("package-to-path", 3, 1, node
, path
, PROM_SCRATCH_SIZE
-1);
1915 /* get and store all properties */
1916 prev_name
= RELOC("");
1917 sstart
= (char *)RELOC(dt_string_start
);
1919 if (call_prom("nextprop", 3, 1, node
, prev_name
,
1924 if (strcmp(RELOC(pname
), RELOC("name")) == 0) {
1925 prev_name
= RELOC("name");
1929 /* find string offset */
1930 soff
= dt_find_string(RELOC(pname
));
1932 prom_printf("WARNING: Can't find string index for"
1933 " <%s>, node %s\n", RELOC(pname
), path
);
1936 prev_name
= sstart
+ soff
;
1939 l
= call_prom("getproplen", 2, 1, node
, RELOC(pname
));
1942 if (l
== PROM_ERROR
)
1944 if (l
> MAX_PROPERTY_LENGTH
) {
1945 prom_printf("WARNING: ignoring large property ");
1946 /* It seems OF doesn't null-terminate the path :-( */
1947 prom_printf("[%s] ", path
);
1948 prom_printf("%s length 0x%x\n", RELOC(pname
), l
);
1952 /* push property head */
1953 dt_push_token(OF_DT_PROP
, mem_start
, mem_end
);
1954 dt_push_token(l
, mem_start
, mem_end
);
1955 dt_push_token(soff
, mem_start
, mem_end
);
1957 /* push property content */
1958 valp
= make_room(mem_start
, mem_end
, l
, 4);
1959 call_prom("getprop", 4, 1, node
, RELOC(pname
), valp
, l
);
1960 *mem_start
= _ALIGN(*mem_start
, 4);
1963 /* Add a "linux,phandle" property. */
1964 soff
= dt_find_string(RELOC("linux,phandle"));
1966 prom_printf("WARNING: Can't find string index for"
1967 " <linux-phandle> node %s\n", path
);
1969 dt_push_token(OF_DT_PROP
, mem_start
, mem_end
);
1970 dt_push_token(4, mem_start
, mem_end
);
1971 dt_push_token(soff
, mem_start
, mem_end
);
1972 valp
= make_room(mem_start
, mem_end
, 4, 4);
1973 *(u32
*)valp
= node
;
1976 /* do all our children */
1977 child
= call_prom("child", 1, 1, node
);
1978 while (child
!= 0) {
1979 scan_dt_build_struct(child
, mem_start
, mem_end
);
1980 child
= call_prom("peer", 1, 1, child
);
1983 dt_push_token(OF_DT_END_NODE
, mem_start
, mem_end
);
1986 static void __init
flatten_device_tree(void)
1989 unsigned long mem_start
, mem_end
, room
;
1990 struct boot_param_header
*hdr
;
1991 struct prom_t
*_prom
= &RELOC(prom
);
1996 * Check how much room we have between alloc top & bottom (+/- a
1997 * few pages), crop to 4Mb, as this is our "chuck" size
1999 room
= RELOC(alloc_top
) - RELOC(alloc_bottom
) - 0x4000;
2000 if (room
> DEVTREE_CHUNK_SIZE
)
2001 room
= DEVTREE_CHUNK_SIZE
;
2002 prom_debug("starting device tree allocs at %x\n", RELOC(alloc_bottom
));
2004 /* Now try to claim that */
2005 mem_start
= (unsigned long)alloc_up(room
, PAGE_SIZE
);
2007 prom_panic("Can't allocate initial device-tree chunk\n");
2008 mem_end
= RELOC(alloc_top
);
2010 /* Get root of tree */
2011 root
= call_prom("peer", 1, 1, (phandle
)0);
2012 if (root
== (phandle
)0)
2013 prom_panic ("couldn't get device tree root\n");
2015 /* Build header and make room for mem rsv map */
2016 mem_start
= _ALIGN(mem_start
, 4);
2017 hdr
= make_room(&mem_start
, &mem_end
,
2018 sizeof(struct boot_param_header
), 4);
2019 RELOC(dt_header_start
) = (unsigned long)hdr
;
2020 rsvmap
= make_room(&mem_start
, &mem_end
, sizeof(mem_reserve_map
), 8);
2022 /* Start of strings */
2023 mem_start
= PAGE_ALIGN(mem_start
);
2024 RELOC(dt_string_start
) = mem_start
;
2025 mem_start
+= 4; /* hole */
2027 /* Add "linux,phandle" in there, we'll need it */
2028 namep
= make_room(&mem_start
, &mem_end
, 16, 1);
2029 strcpy(namep
, RELOC("linux,phandle"));
2030 mem_start
= (unsigned long)namep
+ strlen(namep
) + 1;
2032 /* Build string array */
2033 prom_printf("Building dt strings...\n");
2034 scan_dt_build_strings(root
, &mem_start
, &mem_end
);
2035 RELOC(dt_string_end
) = mem_start
;
2037 /* Build structure */
2038 mem_start
= PAGE_ALIGN(mem_start
);
2039 RELOC(dt_struct_start
) = mem_start
;
2040 prom_printf("Building dt structure...\n");
2041 scan_dt_build_struct(root
, &mem_start
, &mem_end
);
2042 dt_push_token(OF_DT_END
, &mem_start
, &mem_end
);
2043 RELOC(dt_struct_end
) = PAGE_ALIGN(mem_start
);
2046 hdr
->boot_cpuid_phys
= _prom
->cpu
;
2047 hdr
->magic
= OF_DT_HEADER
;
2048 hdr
->totalsize
= RELOC(dt_struct_end
) - RELOC(dt_header_start
);
2049 hdr
->off_dt_struct
= RELOC(dt_struct_start
) - RELOC(dt_header_start
);
2050 hdr
->off_dt_strings
= RELOC(dt_string_start
) - RELOC(dt_header_start
);
2051 hdr
->dt_strings_size
= RELOC(dt_string_end
) - RELOC(dt_string_start
);
2052 hdr
->off_mem_rsvmap
= ((unsigned long)rsvmap
) - RELOC(dt_header_start
);
2053 hdr
->version
= OF_DT_VERSION
;
2054 /* Version 16 is not backward compatible */
2055 hdr
->last_comp_version
= 0x10;
2057 /* Copy the reserve map in */
2058 memcpy(rsvmap
, RELOC(mem_reserve_map
), sizeof(mem_reserve_map
));
2063 prom_printf("reserved memory map:\n");
2064 for (i
= 0; i
< RELOC(mem_reserve_cnt
); i
++)
2065 prom_printf(" %x - %x\n",
2066 RELOC(mem_reserve_map
)[i
].base
,
2067 RELOC(mem_reserve_map
)[i
].size
);
2070 /* Bump mem_reserve_cnt to cause further reservations to fail
2071 * since it's too late.
2073 RELOC(mem_reserve_cnt
) = MEM_RESERVE_MAP_SIZE
;
2075 prom_printf("Device tree strings 0x%x -> 0x%x\n",
2076 RELOC(dt_string_start
), RELOC(dt_string_end
));
2077 prom_printf("Device tree struct 0x%x -> 0x%x\n",
2078 RELOC(dt_struct_start
), RELOC(dt_struct_end
));
2082 #ifdef CONFIG_PPC_MAPLE
2083 /* PIBS Version 1.05.0000 04/26/2005 has an incorrect /ht/isa/ranges property.
2084 * The values are bad, and it doesn't even have the right number of cells. */
2085 static void __init
fixup_device_tree_maple(void)
2088 u32 rloc
= 0x01002000; /* IO space; PCI device = 4 */
2092 name
= "/ht@0/isa@4";
2093 isa
= call_prom("finddevice", 1, 1, ADDR(name
));
2094 if (!PHANDLE_VALID(isa
)) {
2095 name
= "/ht@0/isa@6";
2096 isa
= call_prom("finddevice", 1, 1, ADDR(name
));
2097 rloc
= 0x01003000; /* IO space; PCI device = 6 */
2099 if (!PHANDLE_VALID(isa
))
2102 if (prom_getproplen(isa
, "ranges") != 12)
2104 if (prom_getprop(isa
, "ranges", isa_ranges
, sizeof(isa_ranges
))
2108 if (isa_ranges
[0] != 0x1 ||
2109 isa_ranges
[1] != 0xf4000000 ||
2110 isa_ranges
[2] != 0x00010000)
2113 prom_printf("Fixing up bogus ISA range on Maple/Apache...\n");
2115 isa_ranges
[0] = 0x1;
2116 isa_ranges
[1] = 0x0;
2117 isa_ranges
[2] = rloc
;
2118 isa_ranges
[3] = 0x0;
2119 isa_ranges
[4] = 0x0;
2120 isa_ranges
[5] = 0x00010000;
2121 prom_setprop(isa
, name
, "ranges",
2122 isa_ranges
, sizeof(isa_ranges
));
2125 #define CPC925_MC_START 0xf8000000
2126 #define CPC925_MC_LENGTH 0x1000000
2127 /* The values for memory-controller don't have right number of cells */
2128 static void __init
fixup_device_tree_maple_memory_controller(void)
2132 char *name
= "/hostbridge@f8000000";
2133 struct prom_t
*_prom
= &RELOC(prom
);
2136 mc
= call_prom("finddevice", 1, 1, ADDR(name
));
2137 if (!PHANDLE_VALID(mc
))
2140 if (prom_getproplen(mc
, "reg") != 8)
2143 prom_getprop(_prom
->root
, "#address-cells", &ac
, sizeof(ac
));
2144 prom_getprop(_prom
->root
, "#size-cells", &sc
, sizeof(sc
));
2145 if ((ac
!= 2) || (sc
!= 2))
2148 if (prom_getprop(mc
, "reg", mc_reg
, sizeof(mc_reg
)) == PROM_ERROR
)
2151 if (mc_reg
[0] != CPC925_MC_START
|| mc_reg
[1] != CPC925_MC_LENGTH
)
2154 prom_printf("Fixing up bogus hostbridge on Maple...\n");
2157 mc_reg
[1] = CPC925_MC_START
;
2159 mc_reg
[3] = CPC925_MC_LENGTH
;
2160 prom_setprop(mc
, name
, "reg", mc_reg
, sizeof(mc_reg
));
2163 #define fixup_device_tree_maple()
2164 #define fixup_device_tree_maple_memory_controller()
2167 #ifdef CONFIG_PPC_CHRP
2169 * Pegasos and BriQ lacks the "ranges" property in the isa node
2170 * Pegasos needs decimal IRQ 14/15, not hexadecimal
2171 * Pegasos has the IDE configured in legacy mode, but advertised as native
2173 static void __init
fixup_device_tree_chrp(void)
2177 u32 rloc
= 0x01006000; /* IO space; PCI device = 12 */
2181 name
= "/pci@80000000/isa@c";
2182 ph
= call_prom("finddevice", 1, 1, ADDR(name
));
2183 if (!PHANDLE_VALID(ph
)) {
2184 name
= "/pci@ff500000/isa@6";
2185 ph
= call_prom("finddevice", 1, 1, ADDR(name
));
2186 rloc
= 0x01003000; /* IO space; PCI device = 6 */
2188 if (PHANDLE_VALID(ph
)) {
2189 rc
= prom_getproplen(ph
, "ranges");
2190 if (rc
== 0 || rc
== PROM_ERROR
) {
2191 prom_printf("Fixing up missing ISA range on Pegasos...\n");
2198 prop
[5] = 0x00010000;
2199 prom_setprop(ph
, name
, "ranges", prop
, sizeof(prop
));
2203 name
= "/pci@80000000/ide@C,1";
2204 ph
= call_prom("finddevice", 1, 1, ADDR(name
));
2205 if (PHANDLE_VALID(ph
)) {
2206 prom_printf("Fixing up IDE interrupt on Pegasos...\n");
2209 prom_setprop(ph
, name
, "interrupts", prop
, 2*sizeof(u32
));
2210 prom_printf("Fixing up IDE class-code on Pegasos...\n");
2211 rc
= prom_getprop(ph
, "class-code", prop
, sizeof(u32
));
2212 if (rc
== sizeof(u32
)) {
2214 prom_setprop(ph
, name
, "class-code", prop
, sizeof(u32
));
2219 #define fixup_device_tree_chrp()
2222 #if defined(CONFIG_PPC64) && defined(CONFIG_PPC_PMAC)
2223 static void __init
fixup_device_tree_pmac(void)
2225 phandle u3
, i2c
, mpic
;
2230 /* Some G5s have a missing interrupt definition, fix it up here */
2231 u3
= call_prom("finddevice", 1, 1, ADDR("/u3@0,f8000000"));
2232 if (!PHANDLE_VALID(u3
))
2234 i2c
= call_prom("finddevice", 1, 1, ADDR("/u3@0,f8000000/i2c@f8001000"));
2235 if (!PHANDLE_VALID(i2c
))
2237 mpic
= call_prom("finddevice", 1, 1, ADDR("/u3@0,f8000000/mpic@f8040000"));
2238 if (!PHANDLE_VALID(mpic
))
2241 /* check if proper rev of u3 */
2242 if (prom_getprop(u3
, "device-rev", &u3_rev
, sizeof(u3_rev
))
2245 if (u3_rev
< 0x35 || u3_rev
> 0x39)
2247 /* does it need fixup ? */
2248 if (prom_getproplen(i2c
, "interrupts") > 0)
2251 prom_printf("fixing up bogus interrupts for u3 i2c...\n");
2253 /* interrupt on this revision of u3 is number 0 and level */
2256 prom_setprop(i2c
, "/u3@0,f8000000/i2c@f8001000", "interrupts",
2257 &interrupts
, sizeof(interrupts
));
2259 prom_setprop(i2c
, "/u3@0,f8000000/i2c@f8001000", "interrupt-parent",
2260 &parent
, sizeof(parent
));
2263 #define fixup_device_tree_pmac()
2266 #ifdef CONFIG_PPC_EFIKA
2268 * The MPC5200 FEC driver requires an phy-handle property to tell it how
2269 * to talk to the phy. If the phy-handle property is missing, then this
2270 * function is called to add the appropriate nodes and link it to the
2273 static void __init
fixup_device_tree_efika_add_phy(void)
2279 /* Check if /builtin/ethernet exists - bail if it doesn't */
2280 node
= call_prom("finddevice", 1, 1, ADDR("/builtin/ethernet"));
2281 if (!PHANDLE_VALID(node
))
2284 /* Check if the phy-handle property exists - bail if it does */
2285 rv
= prom_getprop(node
, "phy-handle", prop
, sizeof(prop
));
2290 * At this point the ethernet device doesn't have a phy described.
2291 * Now we need to add the missing phy node and linkage
2294 /* Check for an MDIO bus node - if missing then create one */
2295 node
= call_prom("finddevice", 1, 1, ADDR("/builtin/mdio"));
2296 if (!PHANDLE_VALID(node
)) {
2297 prom_printf("Adding Ethernet MDIO node\n");
2298 call_prom("interpret", 1, 1,
2299 " s\" /builtin\" find-device"
2301 " 1 encode-int s\" #address-cells\" property"
2302 " 0 encode-int s\" #size-cells\" property"
2303 " s\" mdio\" device-name"
2304 " s\" fsl,mpc5200b-mdio\" encode-string"
2305 " s\" compatible\" property"
2306 " 0xf0003000 0x400 reg"
2308 " 0x5 encode-int encode+"
2309 " 0x3 encode-int encode+"
2310 " s\" interrupts\" property"
2314 /* Check for a PHY device node - if missing then create one and
2315 * give it's phandle to the ethernet node */
2316 node
= call_prom("finddevice", 1, 1,
2317 ADDR("/builtin/mdio/ethernet-phy"));
2318 if (!PHANDLE_VALID(node
)) {
2319 prom_printf("Adding Ethernet PHY node\n");
2320 call_prom("interpret", 1, 1,
2321 " s\" /builtin/mdio\" find-device"
2323 " s\" ethernet-phy\" device-name"
2324 " 0x10 encode-int s\" reg\" property"
2328 " s\" /builtin/ethernet\" find-device"
2330 " s\" phy-handle\" property"
2335 static void __init
fixup_device_tree_efika(void)
2337 int sound_irq
[3] = { 2, 2, 0 };
2338 int bcomm_irq
[3*16] = { 3,0,0, 3,1,0, 3,2,0, 3,3,0,
2339 3,4,0, 3,5,0, 3,6,0, 3,7,0,
2340 3,8,0, 3,9,0, 3,10,0, 3,11,0,
2341 3,12,0, 3,13,0, 3,14,0, 3,15,0 };
2346 /* Check if we're really running on a EFIKA */
2347 node
= call_prom("finddevice", 1, 1, ADDR("/"));
2348 if (!PHANDLE_VALID(node
))
2351 rv
= prom_getprop(node
, "model", prop
, sizeof(prop
));
2352 if (rv
== PROM_ERROR
)
2354 if (strcmp(prop
, "EFIKA5K2"))
2357 prom_printf("Applying EFIKA device tree fixups\n");
2359 /* Claiming to be 'chrp' is death */
2360 node
= call_prom("finddevice", 1, 1, ADDR("/"));
2361 rv
= prom_getprop(node
, "device_type", prop
, sizeof(prop
));
2362 if (rv
!= PROM_ERROR
&& (strcmp(prop
, "chrp") == 0))
2363 prom_setprop(node
, "/", "device_type", "efika", sizeof("efika"));
2365 /* CODEGEN,description is exposed in /proc/cpuinfo so
2367 rv
= prom_getprop(node
, "CODEGEN,description", prop
, sizeof(prop
));
2368 if (rv
!= PROM_ERROR
&& (strstr(prop
, "CHRP")))
2369 prom_setprop(node
, "/", "CODEGEN,description",
2370 "Efika 5200B PowerPC System",
2371 sizeof("Efika 5200B PowerPC System"));
2373 /* Fixup bestcomm interrupts property */
2374 node
= call_prom("finddevice", 1, 1, ADDR("/builtin/bestcomm"));
2375 if (PHANDLE_VALID(node
)) {
2376 len
= prom_getproplen(node
, "interrupts");
2378 prom_printf("Fixing bestcomm interrupts property\n");
2379 prom_setprop(node
, "/builtin/bestcom", "interrupts",
2380 bcomm_irq
, sizeof(bcomm_irq
));
2384 /* Fixup sound interrupts property */
2385 node
= call_prom("finddevice", 1, 1, ADDR("/builtin/sound"));
2386 if (PHANDLE_VALID(node
)) {
2387 rv
= prom_getprop(node
, "interrupts", prop
, sizeof(prop
));
2388 if (rv
== PROM_ERROR
) {
2389 prom_printf("Adding sound interrupts property\n");
2390 prom_setprop(node
, "/builtin/sound", "interrupts",
2391 sound_irq
, sizeof(sound_irq
));
2395 /* Make sure ethernet phy-handle property exists */
2396 fixup_device_tree_efika_add_phy();
2399 #define fixup_device_tree_efika()
2402 static void __init
fixup_device_tree(void)
2404 fixup_device_tree_maple();
2405 fixup_device_tree_maple_memory_controller();
2406 fixup_device_tree_chrp();
2407 fixup_device_tree_pmac();
2408 fixup_device_tree_efika();
2411 static void __init
prom_find_boot_cpu(void)
2413 struct prom_t
*_prom
= &RELOC(prom
);
2419 if (prom_getprop(_prom
->chosen
, "cpu", &prom_cpu
, sizeof(prom_cpu
)) <= 0)
2422 cpu_pkg
= call_prom("instance-to-package", 1, 1, prom_cpu
);
2424 prom_getprop(cpu_pkg
, "reg", &getprop_rval
, sizeof(getprop_rval
));
2425 _prom
->cpu
= getprop_rval
;
2427 prom_debug("Booting CPU hw index = %lu\n", _prom
->cpu
);
2430 static void __init
prom_check_initrd(unsigned long r3
, unsigned long r4
)
2432 #ifdef CONFIG_BLK_DEV_INITRD
2433 struct prom_t
*_prom
= &RELOC(prom
);
2435 if (r3
&& r4
&& r4
!= 0xdeadbeef) {
2438 RELOC(prom_initrd_start
) = is_kernel_addr(r3
) ? __pa(r3
) : r3
;
2439 RELOC(prom_initrd_end
) = RELOC(prom_initrd_start
) + r4
;
2441 val
= RELOC(prom_initrd_start
);
2442 prom_setprop(_prom
->chosen
, "/chosen", "linux,initrd-start",
2444 val
= RELOC(prom_initrd_end
);
2445 prom_setprop(_prom
->chosen
, "/chosen", "linux,initrd-end",
2448 reserve_mem(RELOC(prom_initrd_start
),
2449 RELOC(prom_initrd_end
) - RELOC(prom_initrd_start
));
2451 prom_debug("initrd_start=0x%x\n", RELOC(prom_initrd_start
));
2452 prom_debug("initrd_end=0x%x\n", RELOC(prom_initrd_end
));
2454 #endif /* CONFIG_BLK_DEV_INITRD */
2458 * We enter here early on, when the Open Firmware prom is still
2459 * handling exceptions and the MMU hash table for us.
2462 unsigned long __init
prom_init(unsigned long r3
, unsigned long r4
,
2464 unsigned long r6
, unsigned long r7
,
2465 unsigned long kbase
)
2467 struct prom_t
*_prom
;
2471 unsigned long offset
= reloc_offset();
2475 _prom
= &RELOC(prom
);
2478 * First zero the BSS
2480 memset(&RELOC(__bss_start
), 0, __bss_stop
- __bss_start
);
2483 * Init interface to Open Firmware, get some node references,
2486 prom_init_client_services(pp
);
2489 * See if this OF is old enough that we need to do explicit maps
2490 * and other workarounds
2495 * Init prom stdout device
2499 prom_printf("Preparing to boot %s", RELOC(linux_banner
));
2502 * Get default machine type. At this point, we do not differentiate
2503 * between pSeries SMP and pSeries LPAR
2505 RELOC(of_platform
) = prom_find_machine_type();
2507 #ifndef CONFIG_RELOCATABLE
2508 /* Bail if this is a kdump kernel. */
2509 if (PHYSICAL_START
> 0)
2510 prom_panic("Error: You can't boot a kdump kernel from OF!\n");
2514 * Check for an initrd
2516 prom_check_initrd(r3
, r4
);
2518 #ifdef CONFIG_PPC_PSERIES
2520 * On pSeries, inform the firmware about our capabilities
2522 if (RELOC(of_platform
) == PLATFORM_PSERIES
||
2523 RELOC(of_platform
) == PLATFORM_PSERIES_LPAR
)
2524 prom_send_capabilities();
2528 * Copy the CPU hold code
2530 if (RELOC(of_platform
) != PLATFORM_POWERMAC
)
2531 copy_and_flush(0, kbase
, 0x100, 0);
2534 * Do early parsing of command line
2536 early_cmdline_parse();
2539 * Initialize memory management within prom_init
2544 * Determine which cpu is actually running right _now_
2546 prom_find_boot_cpu();
2549 * Initialize display devices
2551 prom_check_displays();
2555 * Initialize IOMMU (TCE tables) on pSeries. Do that before anything else
2556 * that uses the allocator, we need to make sure we get the top of memory
2557 * available for us here...
2559 if (RELOC(of_platform
) == PLATFORM_PSERIES
)
2560 prom_initialize_tce_table();
2564 * On non-powermacs, try to instantiate RTAS and puts all CPUs
2565 * in spin-loops. PowerMacs don't have a working RTAS and use
2566 * a different way to spin CPUs
2568 if (RELOC(of_platform
) != PLATFORM_POWERMAC
) {
2569 prom_instantiate_rtas();
2574 * Fill in some infos for use by the kernel later on
2576 if (RELOC(prom_memory_limit
))
2577 prom_setprop(_prom
->chosen
, "/chosen", "linux,memory-limit",
2578 &RELOC(prom_memory_limit
),
2579 sizeof(prom_memory_limit
));
2581 if (RELOC(prom_iommu_off
))
2582 prom_setprop(_prom
->chosen
, "/chosen", "linux,iommu-off",
2585 if (RELOC(prom_iommu_force_on
))
2586 prom_setprop(_prom
->chosen
, "/chosen", "linux,iommu-force-on",
2589 if (RELOC(prom_tce_alloc_start
)) {
2590 prom_setprop(_prom
->chosen
, "/chosen", "linux,tce-alloc-start",
2591 &RELOC(prom_tce_alloc_start
),
2592 sizeof(prom_tce_alloc_start
));
2593 prom_setprop(_prom
->chosen
, "/chosen", "linux,tce-alloc-end",
2594 &RELOC(prom_tce_alloc_end
),
2595 sizeof(prom_tce_alloc_end
));
2600 * Fixup any known bugs in the device-tree
2602 fixup_device_tree();
2605 * Now finally create the flattened device-tree
2607 prom_printf("copying OF device tree...\n");
2608 flatten_device_tree();
2611 * in case stdin is USB and still active on IBM machines...
2612 * Unfortunately quiesce crashes on some powermacs if we have
2613 * closed stdin already (in particular the powerbook 101).
2615 if (RELOC(of_platform
) != PLATFORM_POWERMAC
)
2619 * Call OF "quiesce" method to shut down pending DMA's from
2622 prom_printf("Calling quiesce...\n");
2623 call_prom("quiesce", 0, 0);
2626 * And finally, call the kernel passing it the flattened device
2627 * tree and NULL as r5, thus triggering the new entry point which
2628 * is common to us and kexec
2630 hdr
= RELOC(dt_header_start
);
2631 prom_printf("returning from prom_init\n");
2632 prom_debug("->dt_header_start=0x%x\n", hdr
);
2635 reloc_got2(-offset
);
2638 __start(hdr
, kbase
, 0);