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Fix the ARM assembly to ensure that the stack is not used.

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@17443 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Karl Kurbjun 2008-05-10 18:30:46 +00:00
parent 80278e45aa
commit 0220a5fbc3
1 changed files with 4 additions and 15 deletions
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19
firmware/target/arm/mmu-arm.c
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@ -33,7 +33,6 @@ void __attribute__((naked)) ttb_init(void) {
}
void __attribute__((naked)) map_section(unsigned int pa, unsigned int va, int mb, int flags) {
#if 0 /* This code needs to be fixed and the C needs to be replaced to ensure that stack is not used */
asm volatile
(
/* pa &= (-1 << 20); // align to 1MB */
@ -78,11 +77,13 @@ void __attribute__((naked)) map_section(unsigned int pa, unsigned int va, int mb
*/
"cmp r2, #0 \n"
"bxle lr \n"
"bxle lr \n"
"mov r3, #0x0 \n"
"loop: \n"
"str r0, [r1], #4 \n"
"add r0, r0, #0x100000 \n"
"sub r2, r2, #0x01 \n"
"add r3, r3, #0x1 \n"
"cmp r2, r3 \n"
"bne loop \n"
"bx lr \n"
:
@ -92,18 +93,6 @@ void __attribute__((naked)) map_section(unsigned int pa, unsigned int va, int mb
(void) va;
(void) mb;
(void) flags;
#else
pa &= (-1 << 20);
pa |= (flags | 0x412);
unsigned int* ttbPtr = TTB_BASE + (va >> 20);
#define MB (1 << 20)
for( ; mb>0; mb--, pa += MB)
{
*(ttbPtr++) = pa;
}
#undef MB
#endif
}
void __attribute__((naked)) enable_mmu(void) {