drc: map bios and fix dummy reads

[pcsx_rearmed.git] / libpcsxcore / new_dynarec / linkage_arm.s

diff --git a/libpcsxcore/new_dynarec/linkage_arm.s b/libpcsxcore/new_dynarec/linkage_arm.s
index 906c466..8f1a2b2 100644 (file)
--- a/libpcsxcore/new_dynarec/linkage_arm.s
+++ b/libpcsxcore/new_dynarec/linkage_arm.s
@@ -803,6 +803,9 @@ new_dyna_start:
 .global        ari_write_ram_mirror8
 .global        ari_write_ram_mirror16
 .global        ari_write_ram_mirror32
+.global        ari_read_bios8
+.global        ari_read_bios16
+.global        ari_read_bios32
 .global        ari_read_io8
 .global        ari_read_io16
 .global        ari_read_io32
@@ -893,6 +896,25 @@ ari_write_ram_mirror32:
        ari_write_ram_mirror (3<<11), word, str
 
 
+.macro ari_read_bios_mirror bic_const op
+       ldr     r0, [fp, #address-dynarec_local]
+       orr     r0, r0, #0x80000000
+       bic     r0, r0, #(0x20000000|\bic_const)        @ map to 0x9fc...
+       \op     r0, [r0]
+       str     r0, [fp, #readmem_dword-dynarec_local]
+       mov     pc, lr
+.endm
+
+ari_read_bios8:
+       ari_read_bios_mirror 0, ldrb
+
+ari_read_bios16:
+       ari_read_bios_mirror 1, ldrh
+
+ari_read_bios32:
+       ari_read_bios_mirror 3, ldr
+
+
 @ for testing
 .macro ari_read_io_old tab_shift
        str     lr, [sp, #-8]! @ EABI alignment..