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Merge branch 'for-2.6.26' of git://git.kernel.org/pub/scm/linux/kernel/git/jwboyer/powerpc-4xx

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* 'for-2.6.26' of git://git.kernel.org/pub/scm/linux/kernel/git/jwboyer/powerpc-4xx:
  [POWERPC] 4xx: Workaround for CHIP_11 Errata
This commit is contained in:
Linus Torvalds 2008-05-19 16:36:28 -07:00
commit c9091f9e57
1 changed files with 21 additions and 0 deletions
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21
arch/powerpc/boot/4xx.c
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@ -21,6 +21,25 @@
#include "reg.h" #include "reg.h"
#include "dcr.h" #include "dcr.h"
static unsigned long chip_11_errata(unsigned long memsize)
{
unsigned long pvr;
pvr = mfpvr();
switch (pvr & 0xf0000ff0) {
case 0x40000850:
case 0x400008d0:
case 0x200008d0:
memsize -= 4096;
break;
default:
break;
}
return memsize;
}
/* Read the 4xx SDRAM controller to get size of system memory. */ /* Read the 4xx SDRAM controller to get size of system memory. */
void ibm4xx_sdram_fixup_memsize(void) void ibm4xx_sdram_fixup_memsize(void)
{ {
@ -34,6 +53,7 @@ void ibm4xx_sdram_fixup_memsize(void)
memsize += SDRAM_CONFIG_BANK_SIZE(bank_config); memsize += SDRAM_CONFIG_BANK_SIZE(bank_config);
} }
memsize = chip_11_errata(memsize);
dt_fixup_memory(0, memsize); dt_fixup_memory(0, memsize);
} }
@ -199,6 +219,7 @@ void ibm4xx_denali_fixup_memsize(void)
bank = 4; /* 4 banks */ bank = 4; /* 4 banks */
memsize = cs * (1 << (col+row)) * bank * dpath; memsize = cs * (1 << (col+row)) * bank * dpath;
memsize = chip_11_errata(memsize);
dt_fixup_memory(0, memsize); dt_fixup_memory(0, memsize);
} }