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Add cache flush in py/asmarm.c and add new MP_PLAT_ALLOC_EXEC and MP_PLAT_FREE_EXEC macros

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Fixes issue #840
This commit is contained in:
Fabian Vogt
2014-09-03 16:59:33 +02:00
parent fc54250d31
commit b7235b8412
7 changed files with 91 additions and 31 deletions
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25
py/asmarm.c
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@@ -40,8 +40,8 @@
struct _asm_arm_t {
uint pass;
uint code_offset;
uint code_size;
mp_uint_t code_offset;
mp_uint_t code_size;
byte *code_base;
byte dummy_data[4];
@@ -64,7 +64,7 @@ asm_arm_t *asm_arm_new(uint max_num_labels) {
void asm_arm_free(asm_arm_t *as, bool free_code) {
if (free_code) {
m_del(byte, as->code_base, as->code_size);
MP_PLAT_FREE_EXEC(as->code_base, as->code_size);
}
m_del_obj(asm_arm_t, as);
@@ -80,9 +80,22 @@ void asm_arm_start_pass(asm_arm_t *as, uint pass) {
void asm_arm_end_pass(asm_arm_t *as) {
if (as->pass == ASM_ARM_PASS_COMPUTE) {
// calculate size of code in bytes
as->code_size = as->code_offset;
as->code_base = m_new(byte, as->code_size);
MP_PLAT_ALLOC_EXEC(as->code_offset, (void**) &as->code_base, &as->code_size);
if(as->code_base == NULL) {
assert(0);
}
}
else if(as->pass == ASM_ARM_PASS_EMIT) {
#ifdef __arm__
// flush I- and D-cache
asm volatile(
"0:"
"mrc p15, 0, r15, c7, c10, 3\n"
"bne 0b\n"
"mov r0, #0\n"
"mcr p15, 0, r0, c7, c7, 0\n"
: : : "r0", "cc");
#endif
}
}