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32x: drc: mmap dram+rom for direct dereference

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git-svn-id: file:///home/notaz/opt/svn/PicoDrive@851 be3aeb3a-fb24-0410-a615-afba39da0efa
This commit is contained in:
notaz 2010-01-02 21:03:04 +00:00
parent f6c49d38cb
commit b081408f66
8 changed files with 200 additions and 71 deletions
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72
cpu/sh2/compiler.c
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@ -496,24 +496,60 @@ static void emit_or_t_if_eq(int srr)
// reg cache must be clean before call
static int emit_memhandler_read(int size)
{
int ctxr;
host_arg2reg(ctxr, 1);
emith_move_r_r(ctxr, CONTEXT_REG);
switch (size) {
case 0: // 8
// must writeback cycles for poll detection stuff
if (reg_map_g2h[SHR_SR] != -1)
emith_ctx_write(reg_map_g2h[SHR_SR], SHR_SR * 4);
emith_call(p32x_sh2_read8);
break;
case 1: // 16
if (reg_map_g2h[SHR_SR] != -1)
emith_ctx_write(reg_map_g2h[SHR_SR], SHR_SR * 4);
emith_call(p32x_sh2_read16);
break;
case 2: // 32
emith_call(p32x_sh2_read32);
break;
int arg0, arg1;
host_arg2reg(arg0, 0);
// must writeback cycles for poll detection stuff
if (reg_map_g2h[SHR_SR] != -1)
emith_ctx_write(reg_map_g2h[SHR_SR], SHR_SR * 4);
arg1 = rcache_get_tmp_arg(1);
emith_move_r_r(arg1, CONTEXT_REG);
#if 1
if (Pico.rom == (void *)0x02000000 && Pico32xMem->sdram == (void *)0x06000000) {
int tmp = rcache_get_tmp();
emith_and_r_r_imm(tmp, arg0, 0xfb000000);
emith_cmp_r_imm(tmp, 0x02000000);
switch (size) {
case 0: // 8
EMITH_SJMP3_START(DCOND_NE);
emith_eor_r_imm_c(DCOND_EQ, arg0, 1);
emith_read8_r_r_offs_c(DCOND_EQ, arg0, arg0, 0);
EMITH_SJMP3_MID(DCOND_NE);
emith_call_cond(DCOND_NE, p32x_sh2_read8);
EMITH_SJMP3_END();
break;
case 1: // 16
EMITH_SJMP3_START(DCOND_NE);
emith_read16_r_r_offs_c(DCOND_EQ, arg0, arg0, 0);
EMITH_SJMP3_MID(DCOND_NE);
emith_call_cond(DCOND_NE, p32x_sh2_read16);
EMITH_SJMP3_END();
break;
case 2: // 32
EMITH_SJMP3_START(DCOND_NE);
emith_read_r_r_offs_c(DCOND_EQ, arg0, arg0, 0);
emith_ror_c(DCOND_EQ, arg0, arg0, 16);
EMITH_SJMP3_MID(DCOND_NE);
emith_call_cond(DCOND_NE, p32x_sh2_read32);
EMITH_SJMP3_END();
break;
}
}
else
#endif
{
switch (size) {
case 0: // 8
emith_call(p32x_sh2_read8);
break;
case 1: // 16
emith_call(p32x_sh2_read16);
break;
case 2: // 32
emith_call(p32x_sh2_read32);
break;
}
}
rcache_invalidate();
// assuming arg0 and retval reg matches