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Code Issues Releases Activity

Use 8 * sizeof(int) instead of hardcoding 32, for the unlikely case this

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code ever get used on a plateform where sizeof(int) != 4.

Suggested by:	jmg
This commit is contained in:
Olivier Houchard 2006-03-02 00:37:40 +00:00
parent d1bd38bb45
commit db45b073f7
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=156199
1 changed files with 13 additions and 8 deletions
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21
sys/arm/arm/vm_machdep.c
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@ -368,8 +368,10 @@ cpu_exit(struct thread *td)
{
}
#define BITS_PER_INT (8 * sizeof(int))
vm_offset_t arm_nocache_startaddr;
static int arm_nocache_allocated[ARM_NOCACHE_KVA_SIZE / (PAGE_SIZE * 32)];
static int arm_nocache_allocated[ARM_NOCACHE_KVA_SIZE / (PAGE_SIZE *
BITS_PER_INT)];
/*
* Functions to map and unmap memory non-cached into KVA the kernel won't try
@ -387,18 +389,19 @@ arm_remap_nocache(void *addr, vm_size_t size)
int i, j;
size = round_page(size);
for (i = 0; i < MIN(ARM_NOCACHE_KVA_SIZE / (PAGE_SIZE * 32),
for (i = 0; i < MIN(ARM_NOCACHE_KVA_SIZE / (PAGE_SIZE * BITS_PER_INT),
ARM_TP_ADDRESS); i++) {
if (!(arm_nocache_allocated[i / 32] & (1 << (i % 32)))) {
if (!(arm_nocache_allocated[i / BITS_PER_INT] & (1 << (i %
BITS_PER_INT)))) {
for (j = i; j < i + (size / (PAGE_SIZE)); j++)
if (arm_nocache_allocated[j / 32] &
(1 << (j % 32)))
if (arm_nocache_allocated[j / BITS_PER_INT] &
(1 << (j % BITS_PER_INT)))
break;
if (j == i + (size / (PAGE_SIZE)))
break;
}
}
if (i < MIN(ARM_NOCACHE_KVA_SIZE / (PAGE_SIZE * 32),
if (i < MIN(ARM_NOCACHE_KVA_SIZE / (PAGE_SIZE * BITS_PER_INT),
ARM_TP_ADDRESS)) {
vm_offset_t tomap = arm_nocache_startaddr + i * PAGE_SIZE;
void *ret = (void *)tomap;
@ -407,7 +410,8 @@ arm_remap_nocache(void *addr, vm_size_t size)
for (; tomap < (vm_offset_t)ret + size; tomap += PAGE_SIZE,
physaddr += PAGE_SIZE, i++) {
pmap_kenter_nocache(tomap, physaddr);
arm_nocache_allocated[i / 32] |= 1 << (i % 32);
arm_nocache_allocated[i / BITS_PER_INT] |= 1 << (i %
BITS_PER_INT);
}
return (ret);
}
@ -423,7 +427,8 @@ arm_unmap_nocache(void *addr, vm_size_t size)
size = round_page(size);
i = (raddr - arm_nocache_startaddr) / (PAGE_SIZE);
for (; size > 0; size -= PAGE_SIZE, i++)
arm_nocache_allocated[i / 32] &= ~(1 << (i % 32));
arm_nocache_allocated[i / BITS_PER_INT] &= ~(1 << (i %
BITS_PER_INT));
}
#ifdef ARM_USE_SMALL_ALLOC