arch/sh64/mach-sim/setup.c

   1 /*
   2  * This file is subject to the terms and conditions of the GNU General Public
   3  * License.  See the file "COPYING" in the main directory of this archive
   4  * for more details.
   5  *
   6  * arch/sh64/mach-sim/setup.c
   7  *
   8  * ST50 Simulator Platform Support
   9  *
  10  * This file handles the architecture-dependent parts of initialization
  11  *
  12  * Copyright (C) 2000, 2001  Paolo Alberelli
  13  *
  14  * lethal@linux-sh.org:          15th May 2003
  15  *    Use the generic procfs cpuinfo interface, just return a valid board name.
  16  */
  17
  18 #include <linux/stddef.h>
  19 #include <linux/init.h>
  20 #include <linux/mm.h>
  21 #include <linux/bootmem.h>
  22 #include <linux/delay.h>
  23 #include <linux/kernel.h>
  24 #include <asm/addrspace.h>
  25 #include <asm/processor.h>
  26 #include <asm/platform.h>
  27 #include <asm/io.h>
  28 #include <asm/irq.h>
  29 #include <asm/page.h>
  30
  31 #ifdef CONFIG_BLK_DEV_INITRD
  32 #include "../rootfs/rootfs.h"
  33 #endif
  34
  35 static  __init void platform_monitor(void);
  36 static  __init void platform_setup(void);
  37 static  __init void platform_reserve(void);
  38
  39
  40 #define PHYS_MEMORY     CONFIG_MEMORY_SIZE_IN_MB*1024*1024
  41
  42 #if (PHYS_MEMORY < P1SEG_FOOTPRINT_RAM)
  43 #error "Invalid kernel configuration. Physical memory below footprint requirements."
  44 #endif
  45
  46 #define RAM_DISK_START  CONFIG_MEMORY_START+P1SEG_INITRD_BLOCK  /* Top of 4MB */
  47 #ifdef PLATFORM_ROMFS_SIZE
  48 #define RAM_DISK_SIZE   (PAGE_ALIGN(PLATFORM_ROMFS_SIZE))     /* Variable Top */
  49 #if ((RAM_DISK_START + RAM_DISK_SIZE) > (CONFIG_MEMORY_START + PHYS_MEMORY))
  50 #error "Invalid kernel configuration. ROM RootFS exceeding physical memory."
  51 #endif
  52 #else
  53 #define RAM_DISK_SIZE   P1SEG_INITRD_BLOCK_SIZE                 /* Top of 4MB */
  54 #endif
  55
  56 #define RES_COUNT(res) ((sizeof((res))/sizeof(struct resource)))
  57
  58 /*
  59  * Platform Dependent Interrupt Priorities.
  60  */
  61
  62 /* Using defaults defined in irq.h */
  63 #define RES NO_PRIORITY         /* Disabled */
  64 #define IR0 IRL0_PRIORITY       /* IRLs */
  65 #define IR1 IRL1_PRIORITY
  66 #define IR2 IRL2_PRIORITY
  67 #define IR3 IRL3_PRIORITY
  68 #define PCA INTA_PRIORITY       /* PCI Ints */
  69 #define PCB INTB_PRIORITY
  70 #define PCC INTC_PRIORITY
  71 #define PCD INTD_PRIORITY
  72 #define SER TOP_PRIORITY
  73 #define ERR TOP_PRIORITY
  74 #define PW0 TOP_PRIORITY
  75 #define PW1 TOP_PRIORITY
  76 #define PW2 TOP_PRIORITY
  77 #define PW3 TOP_PRIORITY
  78 #define DM0 NO_PRIORITY         /* DMA Ints */
  79 #define DM1 NO_PRIORITY
  80 #define DM2 NO_PRIORITY
  81 #define DM3 NO_PRIORITY
  82 #define DAE NO_PRIORITY
  83 #define TU0 TIMER_PRIORITY      /* TMU Ints */
  84 #define TU1 NO_PRIORITY
  85 #define TU2 NO_PRIORITY
  86 #define TI2 NO_PRIORITY
  87 #define ATI NO_PRIORITY         /* RTC Ints */
  88 #define PRI NO_PRIORITY
  89 #define CUI RTC_PRIORITY
  90 #define ERI SCIF_PRIORITY       /* SCIF Ints */
  91 #define RXI SCIF_PRIORITY
  92 #define BRI SCIF_PRIORITY
  93 #define TXI SCIF_PRIORITY
  94 #define ITI TOP_PRIORITY        /* WDT Ints */
  95
  96 /*
  97  * Platform dependent structures: maps and parms block.
  98  */
  99 struct resource io_resources[] = {
 100         /* Nothing yet .. */
 101 };
 102
 103 struct resource kram_resources[] = {
 104         { "Kernel code", 0, 0 },        /* These must be last in the array */
 105         { "Kernel data", 0, 0 }         /* These must be last in the array */
 106 };
 107
 108 struct resource xram_resources[] = {
 109         /* Nothing yet .. */
 110 };
 111
 112 struct resource rom_resources[] = {
 113         /* Nothing yet .. */
 114 };
 115
 116 struct sh64_platform platform_parms = {
 117         .readonly_rootfs =      1,
 118         .initial_root_dev =     0x0100,
 119         .loader_type =          1,
 120         .initrd_start =         RAM_DISK_START,
 121         .initrd_size =          RAM_DISK_SIZE,
 122         .io_res_p =             io_resources,
 123         .io_res_count =         RES_COUNT(io_resources),
 124         .kram_res_p =           kram_resources,
 125         .kram_res_count =       RES_COUNT(kram_resources),
 126         .xram_res_p =           xram_resources,
 127         .xram_res_count =       RES_COUNT(xram_resources),
 128         .rom_res_p =            rom_resources,
 129         .rom_res_count =        RES_COUNT(rom_resources),
 130 };
 131
 132 int platform_int_priority[NR_IRQS] = {
 133         IR0, IR1, IR2, IR3, PCA, PCB, PCC, PCD, /* IRQ  0- 7 */
 134         RES, RES, RES, RES, SER, ERR, PW3, PW2, /* IRQ  8-15 */
 135         PW1, PW0, DM0, DM1, DM2, DM3, DAE, RES, /* IRQ 16-23 */
 136         RES, RES, RES, RES, RES, RES, RES, RES, /* IRQ 24-31 */
 137         TU0, TU1, TU2, TI2, ATI, PRI, CUI, ERI, /* IRQ 32-39 */
 138         RXI, BRI, TXI, RES, RES, RES, RES, RES, /* IRQ 40-47 */
 139         RES, RES, RES, RES, RES, RES, RES, RES, /* IRQ 48-55 */
 140         RES, RES, RES, RES, RES, RES, RES, ITI, /* IRQ 56-63 */
 141 };
 142
 143 void __init platform_setup(void)
 144 {
 145         /* Simulator platform leaves the decision to head.S */
 146         platform_parms.fpu_flags = fpu_in_use;
 147 }
 148
 149 void __init platform_monitor(void)
 150 {
 151         /* Nothing yet .. */
 152 }
 153
 154 void __init platform_reserve(void)
 155 {
 156         /* Nothing yet .. */
 157 }
 158
 159 const char *get_system_type(void)
 160 {
 161         return "SH-5 Simulator";
 162 }
 163