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Fix a bug and stick nearer to the specification, introduce armv6_unified.

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This commit is contained in:
Vladimir 'phcoder' Serbinenko 2013-05-17 13:05:28 +02:00
parent 390df92f0b
commit 470038745c
1 changed files with 49 additions and 12 deletions
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61
grub-core/kern/arm/cache.c
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@ -2,10 +2,13 @@
#include <grub/cache.h>
#include <grub/arm/system.h>
/* This is only about cache architecture. It doesn't imply
the CPU architecture. */
static enum
{
ARCH_UNKNOWN,
ARCH_ARMV6,
ARCH_ARMV6_UNIFIED,
ARCH_ARMV7
} type = ARCH_UNKNOWN;
@ -23,7 +26,7 @@ probe_caches (void)
{
grub_uint32_t main_id, cache_type;
/* Read Cache Type Register */
/* Read main ID Register */
asm volatile ("mrc p15, 0, %0, c0, c0, 0": "=r"(main_id));
if (((main_id >> 12) & 0xf) == 0x0 || ((main_id >> 12) & 0xf) == 0x7
@ -33,17 +36,31 @@ probe_caches (void)
/* Read Cache Type Register */
asm volatile ("mrc p15, 0, %0, c0, c0, 1": "=r"(cache_type));
switch (cache_type >> 29)
switch (cache_type >> 24)
{
case 0:
case 0x04:
case 0x0a:
case 0x0c:
case 0x0e:
case 0x1c:
grub_arch_cache_dlinesz = 8 << ((cache_type >> 12) & 3);
grub_arch_cache_ilinesz = 8 << (cache_type & 3);
type = ARCH_ARMV6_UNIFIED;
break;
case 0x05:
case 0x0b:
case 0x0d:
case 0x0f:
case 0x1d:
grub_arch_cache_dlinesz = 8 << ((cache_type >> 12) & 3);
grub_arch_cache_ilinesz = 8 << (cache_type & 3);
type = ARCH_ARMV6;
break;
case 4:
case 0x80 ... 0x9f:
grub_arch_cache_dlinesz = 4 << ((cache_type >> 16) & 0xf);
grub_arch_cache_ilinesz = 4 << (cache_type & 0xf);
type = ARCH_ARMV7;
break;
default:
grub_fatal ("Unsupported cache type 0x%x", cache_type);
}
@ -54,10 +71,21 @@ grub_arch_sync_caches (void *address, grub_size_t len)
{
if (type == ARCH_UNKNOWN)
probe_caches ();
if (type == ARCH_ARMV6)
grub_arch_sync_caches_armv6 (address, len);
if (type == ARCH_ARMV7)
grub_arch_sync_caches_armv7 (address, len);
switch (type)
{
case ARCH_ARMV6:
grub_arch_sync_caches_armv6 (address, len);
break;
case ARCH_ARMV7:
grub_arch_sync_caches_armv7 (address, len);
break;
/* Nothing to do. */
case ARCH_ARMV6_UNIFIED:
break;
/* Pacify GCC. */
case ARCH_UNKNOWN:
break;
}
}
void
@ -65,8 +93,17 @@ grub_arm_disable_caches_mmu (void)
{
if (type == ARCH_UNKNOWN)
probe_caches ();
if (type == ARCH_ARMV6)
grub_arm_disable_caches_mmu_armv6 ();
if (type == ARCH_ARMV7)
grub_arm_disable_caches_mmu_armv7 ();
switch (type)
{
case ARCH_ARMV6_UNIFIED:
case ARCH_ARMV6:
grub_arm_disable_caches_mmu_armv6 ();
break;
case ARCH_ARMV7:
grub_arm_disable_caches_mmu_armv7 ();
break;
/* Pacify GCC. */
case ARCH_UNKNOWN:
break;
}
}