arch/arm/boot/compressed/head-xscale.S

   1 /*
   2  * linux/arch/arm/boot/compressed/head-xscale.S
   3  *
   4  * XScale specific tweaks.  This is merged into head.S by the linker.
   5  *
   6  */
   7
   8 #include <linux/linkage.h>
   9 #include <asm/mach-types.h>
  10
  11                 .section        ".start", "ax"
  12
  13 __XScale_start:
  14
  15                 @ Preserve r8/r7 i.e. kernel entry values
  16
  17                 @ Data cache might be active.
  18                 @ Be sure to flush kernel binary out of the cache,
  19                 @ whatever state it is, before it is turned off.
  20                 @ This is done by fetching through currently executed
  21                 @ memory to be sure we hit the same cache.
  22                 bic     r2, pc, #0x1f
  23                 add     r3, r2, #0x10000        @ 64 kb is quite enough...
  24 1:              ldr     r0, [r2], #32
  25                 teq     r2, r3
  26                 bne     1b
  27                 mcr     p15, 0, r0, c7, c10, 4  @ drain WB
  28                 mcr     p15, 0, r0, c7, c7, 0   @ flush I & D caches
  29
  30                 @ disabling MMU and caches
  31                 mrc     p15, 0, r0, c1, c0, 0   @ read control reg
  32                 bic     r0, r0, #0x05           @ clear DC, MMU
  33                 bic     r0, r0, #0x1000         @ clear Icache
  34                 mcr     p15, 0, r0, c1, c0, 0
  35
  36 #ifdef CONFIG_ARCH_LUBBOCK
  37                 mov     r7, #MACH_TYPE_LUBBOCK
  38 #endif
  39
  40 #ifdef CONFIG_ARCH_COTULLA_IDP
  41                 mov     r7, #MACH_TYPE_COTULLA_IDP
  42 #endif
  43
  44 #ifdef CONFIG_ARCH_IQ80310
  45                 /*
  46                  * Crank the CPU up to 733MHz
  47                  */
  48                 mov     r1, #9
  49                 mcr     p14, 0, r1, c6, c0, 0
  50
  51                 /*
  52                  * Disable ECC error notification
  53                  * At some point, we should add an ECC handler to Linux
  54                  */
  55                 mov     r1, #0x1500
  56                 mov     r0, #0x4
  57                 str     r0, [r1, #0x34]
  58
  59                 mov     r7, #MACH_TYPE_IQ80310
  60 #endif
  61
  62 #ifdef CONFIG_ARCH_IXDP425
  63                 mov     r7, #MACH_TYPE_IXDP425
  64 #endif
  65
  66 #ifdef CONFIG_MACH_IXDP465
  67                 mov r7, #MACH_TYPE_IXDP465 & 0xff
  68                 orr r7, r7, #MACH_TYPE_IXDP465 & 0xff00
  69 #endif
  70
  71 #ifdef CONFIG_MACH_IXDPG425
  72                 mov r7, #MACH_TYPE_IXDPG425 & 0xff
  73                 orr r7, r7, #MACH_TYPE_IXDPG425 & 0xff00
  74 #endif
  75
  76 #ifdef CONFIG_ARCH_PRPMC1100
  77                 mov     r7, #(MACH_TYPE_PRPMC1100 & 0xff)
  78                 orr     r7, r7, #(MACH_TYPE_PRPMC1100 & 0xff00)
  79 #endif
  80
  81 #ifdef CONFIG_ARCH_ADI_COYOTE
  82                 # Set machine ID into r7 (Coyote ID > 255 hence needs
  83                 # two instructions to build the ID safely).
  84                 mov r7, #MACH_TYPE_ADI_COYOTE & 0xff
  85                 orr r7, r7, #MACH_TYPE_ADI_COYOTE & 0xff00
  86 #endif
  87
  88 #ifdef CONFIG_ARCH_SE4000
  89                 mov r7, #MACH_TYPE_SE4000 & 0xff
  90                 orr r7, r7, #MACH_TYPE_SE4000 & 0xff00
  91 #endif
  92
  93 #ifdef CONFIG_MACH_ESS710
  94                 mov r7, #MACH_TYPE_ESS710 & 0xff
  95                 orr r7, r7, #MACH_TYPE_ESS710 & 0xff00
  96 #endif
  97
  98 #ifdef CONFIG_MACH_SG720
  99                 mov r7, #MACH_TYPE_SG720 & 0xff
 100                 orr r7, r7, #MACH_TYPE_SG720 & 0xff00
 101 #endif
 102
 103 #ifdef CONFIG_MACH_MONTEJADE
 104                 mov r7, #MACH_TYPE_MONTEJADE & 0xff
 105                 orr r7, r7, #MACH_TYPE_MONTEJADE & 0xff00
 106 #endif
 107
 108 #ifdef CONFIG_MACH_IVPN
 109                 mov r7, #MACH_TYPE_IVPN & 0xff
 110                 orr r7, r7, #MACH_TYPE_IVPN & 0xff00
 111 #endif
 112
 113 #ifdef CONFIG_MACH_SE5100
 114                 mov r7, #MACH_TYPE_SE5100 & 0xff
 115                 orr r7, r7, #MACH_TYPE_SE5100 & 0xff00
 116 #endif
 117
 118 #ifdef CONFIG_MACH_SG560
 119                 mov r7, #MACH_TYPE_SG560 & 0xff
 120                 orr r7, r7, #MACH_TYPE_SG560 & 0xff00
 121 #endif
 122
 123 #ifdef CONFIG_MACH_SG565
 124                 mov r7, #MACH_TYPE_SG565 & 0xff
 125                 orr r7, r7, #MACH_TYPE_SG565 & 0xff00
 126 #endif
 127
 128 #ifdef CONFIG_MACH_SG580
 129                 mov r7, #MACH_TYPE_SG580 & 0xff
 130                 orr r7, r7, #MACH_TYPE_SG580 & 0xff00
 131 #endif
 132
 133 #ifdef CONFIG_MACH_SG590
 134                 mov r7, #MACH_TYPE_SG590 & 0xff
 135                 orr r7, r7, #MACH_TYPE_SG590 & 0xff00
 136 #endif
 137
 138 #ifdef CONFIG_MACH_SG640
 139                 mov r7, #MACH_TYPE_SG640 & 0xff
 140                 orr r7, r7, #MACH_TYPE_SG640 & 0xff00
 141 #endif
 142
 143 #ifdef  CONFIG_MACH_GTWX5715
 144                mov     r7, #(MACH_TYPE_GTWX5715 & 0xff)
 145                orr     r7, r7, #(MACH_TYPE_GTWX5715 & 0xff00)
 146 #endif
 147
 148 #ifdef CONFIG_ARCH_IXP2000
 149                 mov     r1, #-1
 150                 mov     r0, #0xd6000000
 151                 str     r1, [r0, #0x14]
 152                 str     r1, [r0, #0x18]
 153 #endif
 154