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gbeauche |
1.1 |
/* |
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* asm_linux.S - Assembly routines |
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* |
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* SheepShaver (C) 1997-2005 Christian Bauer and Marc Hellwig |
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* |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation; either version 2 of the License, or |
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* (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program; if not, write to the Free Software |
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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*/ |
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#include <ppc_asm.tmpl> |
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#include <xlowmem.h> |
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#define SAVE_FP_EXEC_68K 1 |
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/* |
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* void *get_toc(void) - Get TOC pointer (small data pointer r13 under Linux) |
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*/ |
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ASM_GLOBAL_DIRECTIVE C_SYMBOL_NAME(get_toc) |
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C_SYMBOL_NAME(get_toc): |
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mr r3,r13 |
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blr |
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/* |
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* void *get_sp(void) - Get stack pointer |
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*/ |
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ASM_GLOBAL_DIRECTIVE C_SYMBOL_NAME(get_sp) |
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C_SYMBOL_NAME(get_sp): |
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mr r3,r1 |
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blr |
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/* |
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* void set_r2(uint32 val {r3}) - Set r2 |
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*/ |
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ASM_GLOBAL_DIRECTIVE C_SYMBOL_NAME(set_r2) |
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C_SYMBOL_NAME(set_r2): |
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mr r2,r3 |
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blr |
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/* |
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* void flush_icache_range(void *start {r3}, void *end {r3}) - Flush D and I cache |
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*/ |
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CACHE_LINE_SIZE = 32 |
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LG_CACHE_LINE_SIZE = 5 |
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ASM_GLOBAL_DIRECTIVE C_SYMBOL_NAME(flush_icache_range) |
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C_SYMBOL_NAME(flush_icache_range): |
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li r5,CACHE_LINE_SIZE-1 |
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andc r3,r3,r5 |
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subf r4,r3,r4 |
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add r4,r4,r5 |
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srwi. r4,r4,LG_CACHE_LINE_SIZE |
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beqlr |
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mtctr r4 |
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mr r6,r3 |
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1: dcbst 0,r3 |
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addi r3,r3,CACHE_LINE_SIZE |
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bdnz 1b |
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sync /* wait for dcbst's to get to ram */ |
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mtctr r4 |
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2: icbi 0,r6 |
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addi r6,r6,CACHE_LINE_SIZE |
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bdnz 2b |
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sync |
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isync |
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blr |
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/* |
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* long atomic_add(long *var{r3}, long add{r4}) - Atomic add operation |
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* long atomic_and(long *var{r3}, long and{r4}) - Atomic and operation |
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* long atomic_or(long *var{r3}, long or{r4}) - Atomic or operation |
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* int test_and_set(int *var{r3}, int val{r4}) - Atomic test-and-set |
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*/ |
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ASM_GLOBAL_DIRECTIVE C_SYMBOL_NAME(atomic_add) |
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C_SYMBOL_NAME(atomic_add): |
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0: dcbf 0,r3 |
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sync |
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ori r0,r0,1 |
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ori r0,r0,1 |
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ori r0,r0,1 |
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ori r0,r0,1 |
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ori r0,r0,1 |
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ori r0,r0,1 |
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isync |
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lwarx r5,0,r3 |
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add r0,r4,r5 |
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stwcx. r0,0,r3 |
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bne- 0b |
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mr r3,r5 |
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isync |
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blr |
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ASM_GLOBAL_DIRECTIVE C_SYMBOL_NAME(atomic_and) |
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C_SYMBOL_NAME(atomic_and): |
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0: dcbf 0,r3 |
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sync |
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ori r0,r0,1 |
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ori r0,r0,1 |
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ori r0,r0,1 |
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ori r0,r0,1 |
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ori r0,r0,1 |
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ori r0,r0,1 |
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isync |
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lwarx r5,0,r3 |
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and r0,r4,r5 |
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stwcx. r0,0,r3 |
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bne- 0b |
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mr r3,r5 |
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isync |
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blr |
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ASM_GLOBAL_DIRECTIVE C_SYMBOL_NAME(atomic_or) |
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C_SYMBOL_NAME(atomic_or): |
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0: dcbf 0,r3 |
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sync |
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ori r0,r0,1 |
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ori r0,r0,1 |
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ori r0,r0,1 |
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ori r0,r0,1 |
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ori r0,r0,1 |
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ori r0,r0,1 |
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isync |
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lwarx r5,0,r3 |
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or r0,r4,r5 |
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stwcx. r0,0,r3 |
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bne- 0b |
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mr r3,r5 |
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isync |
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blr |
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ASM_GLOBAL_DIRECTIVE C_SYMBOL_NAME(test_and_set) |
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C_SYMBOL_NAME(test_and_set): |
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0: dcbf 0,r3 |
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sync |
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ori r0,r0,1 |
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ori r0,r0,1 |
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ori r0,r0,1 |
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ori r0,r0,1 |
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ori r0,r0,1 |
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ori r0,r0,1 |
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isync |
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lwarx r5,0,r3 |
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cmpi 0,r5,0x0000 |
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beq 1f |
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stwcx. r4,0,r3 |
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bne- 0b |
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1: isync |
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mr r3,r5 |
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blr |
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/* |
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* void quit_emulator(void) - Jump to XLM_EMUL_RETURN_PROC |
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*/ |
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ASM_GLOBAL_DIRECTIVE C_SYMBOL_NAME(quit_emulator) |
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C_SYMBOL_NAME(quit_emulator): |
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lwz r0,XLM_EMUL_RETURN_PROC(0) |
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mtlr r0 |
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blr |
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/* |
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* void jump_to_rom(uint32 entry {r3}, uint32 emulator_data {r4}) - Jump to Mac ROM |
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*/ |
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ASM_GLOBAL_DIRECTIVE C_SYMBOL_NAME(jump_to_rom) |
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C_SYMBOL_NAME(jump_to_rom): |
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// Create stack frame |
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mflr r0 |
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stw r0,4(r1) |
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stwu r1,-(20+19*4+18*8)(r1) // maintain 16 byte alignment |
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// Save PowerPC registers |
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stmw r13,20(r1) |
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stfd f14,20+19*4+0*8(r1) |
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stfd f15,20+19*4+1*8(r1) |
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stfd f16,20+19*4+2*8(r1) |
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stfd f17,20+19*4+3*8(r1) |
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stfd f18,20+19*4+4*8(r1) |
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stfd f19,20+19*4+5*8(r1) |
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stfd f20,20+19*4+6*8(r1) |
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stfd f21,20+19*4+7*8(r1) |
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stfd f22,20+19*4+8*8(r1) |
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stfd f23,20+19*4+9*8(r1) |
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stfd f24,20+19*4+10*8(r1) |
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stfd f25,20+19*4+11*8(r1) |
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stfd f26,20+19*4+12*8(r1) |
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stfd f27,20+19*4+13*8(r1) |
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stfd f28,20+19*4+14*8(r1) |
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stfd f29,20+19*4+15*8(r1) |
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stfd f30,20+19*4+16*8(r1) |
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stfd f31,20+19*4+17*8(r1) |
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// Move entry address to ctr |
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mtctr r3 |
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// Skip over EMUL_RETURN routine and get its address |
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bl 1f |
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/* |
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* EMUL_RETURN: Returned from emulator |
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*/ |
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// Restore PowerPC registers |
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lwz r1,XLM_EMUL_RETURN_STACK(0) |
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lmw r13,20(r1) |
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lfd f14,20+19*4+0*8(r1) |
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lfd f15,20+19*4+1*8(r1) |
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lfd f16,20+19*4+2*8(r1) |
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lfd f17,20+19*4+3*8(r1) |
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lfd f18,20+19*4+4*8(r1) |
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lfd f19,20+19*4+5*8(r1) |
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lfd f20,20+19*4+6*8(r1) |
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lfd f21,20+19*4+7*8(r1) |
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lfd f22,20+19*4+8*8(r1) |
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lfd f23,20+19*4+9*8(r1) |
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lfd f24,20+19*4+10*8(r1) |
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lfd f25,20+19*4+11*8(r1) |
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lfd f26,20+19*4+12*8(r1) |
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lfd f27,20+19*4+13*8(r1) |
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lfd f28,20+19*4+14*8(r1) |
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lfd f29,20+19*4+15*8(r1) |
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lfd f30,20+19*4+16*8(r1) |
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lfd f31,20+19*4+17*8(r1) |
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// Exiting from 68k emulator |
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li r0,1 |
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stw r0,XLM_IRQ_NEST(0) |
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li r0,MODE_NATIVE |
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stw r0,XLM_RUN_MODE(0) |
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// Return to caller of jump_to_rom() |
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lwz r0,20+19*4+18*8+4(r1) |
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mtlr r0 |
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addi r1,r1,20+19*4+18*8 |
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blr |
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// Save address of EMUL_RETURN routine for 68k emulator patch |
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1: mflr r0 |
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stw r0,XLM_EMUL_RETURN_PROC(0) |
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// Skip over EXEC_RETURN routine and get its address |
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bl 2f |
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/* |
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* EXEC_RETURN: Returned from 68k routine executed with Execute68k() |
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*/ |
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// Save r25 (contains current 68k interrupt level) |
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stw r25,XLM_68K_R25(0) |
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// Reentering EMUL_OP mode |
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li r0,MODE_EMUL_OP |
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stw r0,XLM_RUN_MODE(0) |
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// Save 68k registers |
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lwz r4,48(r1) // Pointer to M68kRegisters |
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stw r8,0*4(r4) // d[0]...d[7] |
| 283 |
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stw r9,1*4(r4) |
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stw r10,2*4(r4) |
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stw r11,3*4(r4) |
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stw r12,4*4(r4) |
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stw r13,5*4(r4) |
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stw r14,6*4(r4) |
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stw r15,7*4(r4) |
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stw r16,8*4(r4) // a[0]..a[6] |
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stw r17,9*4(r4) |
| 292 |
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stw r18,10*4(r4) |
| 293 |
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stw r19,11*4(r4) |
| 294 |
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stw r20,12*4(r4) |
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stw r21,13*4(r4) |
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stw r22,14*4(r4) |
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// Restore PowerPC registers |
| 299 |
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lmw r13,56(r1) |
| 300 |
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#if SAVE_FP_EXEC_68K |
| 301 |
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lfd f14,56+19*4+0*8(r1) |
| 302 |
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lfd f15,56+19*4+1*8(r1) |
| 303 |
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lfd f16,56+19*4+2*8(r1) |
| 304 |
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lfd f17,56+19*4+3*8(r1) |
| 305 |
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lfd f18,56+19*4+4*8(r1) |
| 306 |
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lfd f19,56+19*4+5*8(r1) |
| 307 |
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lfd f20,56+19*4+6*8(r1) |
| 308 |
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lfd f21,56+19*4+7*8(r1) |
| 309 |
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lfd f22,56+19*4+8*8(r1) |
| 310 |
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lfd f23,56+19*4+9*8(r1) |
| 311 |
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lfd f24,56+19*4+10*8(r1) |
| 312 |
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lfd f25,56+19*4+11*8(r1) |
| 313 |
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lfd f26,56+19*4+12*8(r1) |
| 314 |
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lfd f27,56+19*4+13*8(r1) |
| 315 |
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lfd f28,56+19*4+14*8(r1) |
| 316 |
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lfd f29,56+19*4+15*8(r1) |
| 317 |
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lfd f30,56+19*4+16*8(r1) |
| 318 |
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lfd f31,56+19*4+17*8(r1) |
| 319 |
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#endif |
| 320 |
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| 321 |
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// Return to caller |
| 322 |
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lwz r0,52(r1) |
| 323 |
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mtcrf 0xff,r0 |
| 324 |
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lwz r0,56+19*4+18*8+4(r1) |
| 325 |
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mtlr r0 |
| 326 |
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addi r1,r1,56+19*4+18*8 |
| 327 |
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blr |
| 328 |
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| 329 |
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| 330 |
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// Save address of EXEC_RETURN routine for 68k emulator patch |
| 331 |
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2: mflr r0 |
| 332 |
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stw r0,XLM_EXEC_RETURN_PROC(0) |
| 333 |
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| 334 |
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// Skip over EMUL_BREAK/EMUL_OP routine and get its address |
| 335 |
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bl 3f |
| 336 |
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| 337 |
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| 338 |
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/* |
| 339 |
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* EMUL_BREAK/EMUL_OP: Execute native routine, selector in r5 (my own private mode switch) |
| 340 |
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* |
| 341 |
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* 68k registers are stored in a M68kRegisters struct on the stack |
| 342 |
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* which the native routine may read and modify |
| 343 |
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*/ |
| 344 |
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| 345 |
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// Save r25 (contains current 68k interrupt level) |
| 346 |
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stw r25,XLM_68K_R25(0) |
| 347 |
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| 348 |
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// Entering EMUL_OP mode within 68k emulator |
| 349 |
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li r0,MODE_EMUL_OP |
| 350 |
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stw r0,XLM_RUN_MODE(0) |
| 351 |
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| 352 |
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// Create PowerPC stack frame, reserve space for M68kRegisters |
| 353 |
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mr r3,r1 |
| 354 |
|
|
subi r1,r1,64 // Fake "caller" frame |
| 355 |
|
|
rlwinm r1,r1,0,0,27 // Align stack |
| 356 |
|
|
|
| 357 |
|
|
mfcr r0 |
| 358 |
|
|
rlwinm r0,r0,0,11,8 |
| 359 |
|
|
stw r0,4(r1) |
| 360 |
|
|
mfxer r0 |
| 361 |
|
|
stw r0,16(r1) |
| 362 |
|
|
stw r2,12(r1) |
| 363 |
|
|
stwu r1,-(24+16*4+15*8)(r1) |
| 364 |
|
|
|
| 365 |
|
|
// Save 68k registers (M68kRegisters) |
| 366 |
|
|
stw r8,24+0*4(r1) // d[0]..d[7] |
| 367 |
|
|
stw r9,24+1*4(r1) |
| 368 |
|
|
stw r10,24+2*4(r1) |
| 369 |
|
|
stw r11,24+3*4(r1) |
| 370 |
|
|
stw r12,24+4*4(r1) |
| 371 |
|
|
stw r13,24+5*4(r1) |
| 372 |
|
|
stw r14,24+6*4(r1) |
| 373 |
|
|
stw r15,24+7*4(r1) |
| 374 |
|
|
stw r16,24+8*4(r1) // a[0]..a[7] |
| 375 |
|
|
stw r17,24+9*4(r1) |
| 376 |
|
|
stw r18,24+10*4(r1) |
| 377 |
|
|
stw r19,24+11*4(r1) |
| 378 |
|
|
stw r20,24+12*4(r1) |
| 379 |
|
|
stw r21,24+13*4(r1) |
| 380 |
|
|
stw r22,24+14*4(r1) |
| 381 |
|
|
stw r3,24+15*4(r1) |
| 382 |
|
|
stfd f0,24+16*4+0*8(r1) |
| 383 |
|
|
stfd f1,24+16*4+1*8(r1) |
| 384 |
|
|
stfd f2,24+16*4+2*8(r1) |
| 385 |
|
|
stfd f3,24+16*4+3*8(r1) |
| 386 |
|
|
stfd f4,24+16*4+4*8(r1) |
| 387 |
|
|
stfd f5,24+16*4+5*8(r1) |
| 388 |
|
|
stfd f6,24+16*4+6*8(r1) |
| 389 |
|
|
stfd f7,24+16*4+7*8(r1) |
| 390 |
|
|
mffs f0 |
| 391 |
|
|
stfd f8,24+16*4+8*8(r1) |
| 392 |
|
|
stfd f9,24+16*4+9*8(r1) |
| 393 |
|
|
stfd f10,24+16*4+10*8(r1) |
| 394 |
|
|
stfd f11,24+16*4+11*8(r1) |
| 395 |
|
|
stfd f12,24+16*4+12*8(r1) |
| 396 |
|
|
stfd f13,24+16*4+13*8(r1) |
| 397 |
|
|
stfd f0,24+16*4+14*8(r1) |
| 398 |
|
|
|
| 399 |
|
|
// Execute native routine |
| 400 |
|
|
lwz r13,XLM_TOC(0) |
| 401 |
|
|
addi r3,r1,24 |
| 402 |
|
|
mr r4,r24 |
| 403 |
|
|
bl C_SYMBOL_NAME(EmulOp) |
| 404 |
|
|
|
| 405 |
|
|
// Restore 68k registers (M68kRegisters) |
| 406 |
|
|
lwz r8,24+0*4(r1) // d[0]..d[7] |
| 407 |
|
|
lwz r9,24+1*4(r1) |
| 408 |
|
|
lwz r10,24+2*4(r1) |
| 409 |
|
|
lwz r11,24+3*4(r1) |
| 410 |
|
|
lwz r12,24+4*4(r1) |
| 411 |
|
|
lwz r13,24+5*4(r1) |
| 412 |
|
|
lwz r14,24+6*4(r1) |
| 413 |
|
|
lwz r15,24+7*4(r1) |
| 414 |
|
|
lwz r16,24+8*4(r1) // a[0]..a[7] |
| 415 |
|
|
lwz r17,24+9*4(r1) |
| 416 |
|
|
lwz r18,24+10*4(r1) |
| 417 |
|
|
lwz r19,24+11*4(r1) |
| 418 |
|
|
lwz r20,24+12*4(r1) |
| 419 |
|
|
lwz r21,24+13*4(r1) |
| 420 |
|
|
lwz r22,24+14*4(r1) |
| 421 |
|
|
lwz r3,24+15*4(r1) |
| 422 |
|
|
lfd f13,24+16*4+14*8(r1) |
| 423 |
|
|
lfd f0,24+16*4+0*8(r1) |
| 424 |
|
|
lfd f1,24+16*4+1*8(r1) |
| 425 |
|
|
lfd f2,24+16*4+2*8(r1) |
| 426 |
|
|
lfd f3,24+16*4+3*8(r1) |
| 427 |
|
|
lfd f4,24+16*4+4*8(r1) |
| 428 |
|
|
lfd f5,24+16*4+5*8(r1) |
| 429 |
|
|
lfd f6,24+16*4+6*8(r1) |
| 430 |
|
|
lfd f7,24+16*4+7*8(r1) |
| 431 |
|
|
mtfsf 0xff,f13 |
| 432 |
|
|
lfd f8,24+16*4+8*8(r1) |
| 433 |
|
|
lfd f9,24+16*4+9*8(r1) |
| 434 |
|
|
lfd f10,24+16*4+10*8(r1) |
| 435 |
|
|
lfd f11,24+16*4+11*8(r1) |
| 436 |
|
|
lfd f12,24+16*4+12*8(r1) |
| 437 |
|
|
lfd f13,24+16*4+13*8(r1) |
| 438 |
|
|
|
| 439 |
|
|
// Delete PowerPC stack frame |
| 440 |
|
|
lwz r2,24+16*4+15*8+12(r1) |
| 441 |
|
|
lwz r0,24+16*4+15*8+16(r1) |
| 442 |
|
|
mtxer r0 |
| 443 |
|
|
lwz r0,24+16*4+15*8+4(r1) |
| 444 |
|
|
mtcrf 0xff,r0 |
| 445 |
|
|
mr r1,r3 |
| 446 |
|
|
|
| 447 |
|
|
// Reentering 68k emulator |
| 448 |
|
|
li r0,MODE_68K |
| 449 |
|
|
stw r0,XLM_RUN_MODE(0) |
| 450 |
|
|
|
| 451 |
|
|
// Set r0 to 0 for 68k emulator |
| 452 |
|
|
li r0,0 |
| 453 |
|
|
|
| 454 |
|
|
// Execute next 68k opcode |
| 455 |
|
|
rlwimi r29,r27,3,13,28 |
| 456 |
|
|
lhau r27,2(r24) |
| 457 |
|
|
mtlr r29 |
| 458 |
|
|
blr |
| 459 |
|
|
|
| 460 |
|
|
|
| 461 |
|
|
// Save address of EMUL_BREAK/EMUL_OP routine for 68k emulator patch |
| 462 |
|
|
3: mflr r0 |
| 463 |
|
|
stw r0,XLM_EMUL_OP_PROC(0) |
| 464 |
|
|
|
| 465 |
|
|
// Save stack pointer for EMUL_RETURN |
| 466 |
|
|
stw r1,XLM_EMUL_RETURN_STACK(0) |
| 467 |
|
|
|
| 468 |
|
|
// Preset registers for ROM boot routine |
| 469 |
|
|
lis r3,0x40b0 // Pointer to ROM boot structure |
| 470 |
|
|
ori r3,r3,0xd000 |
| 471 |
|
|
|
| 472 |
|
|
// 68k emulator is now active |
| 473 |
|
|
li r0,MODE_68K |
| 474 |
|
|
stw r0,XLM_RUN_MODE(0) |
| 475 |
|
|
|
| 476 |
|
|
// Jump to ROM |
| 477 |
|
|
bctr |
| 478 |
|
|
|
| 479 |
|
|
|
| 480 |
|
|
/* |
| 481 |
|
|
* void execute_68k(uint32 pc {r3}, M68kRegisters *r {r4}) - Execute 68k routine |
| 482 |
|
|
*/ |
| 483 |
|
|
|
| 484 |
|
|
ASM_GLOBAL_DIRECTIVE C_SYMBOL_NAME(execute_68k) |
| 485 |
|
|
C_SYMBOL_NAME(execute_68k): |
| 486 |
|
|
// Create MacOS stack frame |
| 487 |
|
|
mflr r0 |
| 488 |
|
|
stw r0,4(r1) |
| 489 |
|
|
stwu r1,-(56+19*4+18*8)(r1) |
| 490 |
|
|
mfcr r0 |
| 491 |
|
|
stw r4,48(r1) // save pointer to M68kRegisters for EXEC_RETURN |
| 492 |
|
|
stw r0,52(r1) // save CR |
| 493 |
|
|
|
| 494 |
|
|
// Save PowerPC registers |
| 495 |
|
|
stmw r13,56(r1) |
| 496 |
|
|
#if SAVE_FP_EXEC_68K |
| 497 |
|
|
stfd f14,56+19*4+0*8(r1) |
| 498 |
|
|
stfd f15,56+19*4+1*8(r1) |
| 499 |
|
|
stfd f16,56+19*4+2*8(r1) |
| 500 |
|
|
stfd f17,56+19*4+3*8(r1) |
| 501 |
|
|
stfd f18,56+19*4+4*8(r1) |
| 502 |
|
|
stfd f19,56+19*4+5*8(r1) |
| 503 |
|
|
stfd f20,56+19*4+6*8(r1) |
| 504 |
|
|
stfd f21,56+19*4+7*8(r1) |
| 505 |
|
|
stfd f22,56+19*4+8*8(r1) |
| 506 |
|
|
stfd f23,56+19*4+9*8(r1) |
| 507 |
|
|
stfd f24,56+19*4+10*8(r1) |
| 508 |
|
|
stfd f25,56+19*4+11*8(r1) |
| 509 |
|
|
stfd f26,56+19*4+12*8(r1) |
| 510 |
|
|
stfd f27,56+19*4+13*8(r1) |
| 511 |
|
|
stfd f28,56+19*4+14*8(r1) |
| 512 |
|
|
stfd f29,56+19*4+15*8(r1) |
| 513 |
|
|
stfd f30,56+19*4+16*8(r1) |
| 514 |
|
|
stfd f31,56+19*4+17*8(r1) |
| 515 |
|
|
#endif |
| 516 |
|
|
|
| 517 |
|
|
// Set up registers for 68k emulator |
| 518 |
|
|
lwz r31,XLM_KERNEL_DATA(0) // Pointer to Kernel Data |
| 519 |
|
|
addi r31,r31,0x1000 |
| 520 |
|
|
li r0,0 |
| 521 |
|
|
mtcrf 0xff,r0 |
| 522 |
|
|
creqv 11,11,11 // Supervisor mode |
| 523 |
|
|
lwz r8,0*4(r4) // d[0]..d[7] |
| 524 |
|
|
lwz r9,1*4(r4) |
| 525 |
|
|
lwz r10,2*4(r4) |
| 526 |
|
|
lwz r11,3*4(r4) |
| 527 |
|
|
lwz r12,4*4(r4) |
| 528 |
|
|
lwz r13,5*4(r4) |
| 529 |
|
|
lwz r14,6*4(r4) |
| 530 |
|
|
lwz r15,7*4(r4) |
| 531 |
|
|
lwz r16,8*4(r4) // a[0]..a[6] |
| 532 |
|
|
lwz r17,9*4(r4) |
| 533 |
|
|
lwz r18,10*4(r4) |
| 534 |
|
|
lwz r19,11*4(r4) |
| 535 |
|
|
lwz r20,12*4(r4) |
| 536 |
|
|
lwz r21,13*4(r4) |
| 537 |
|
|
lwz r22,14*4(r4) |
| 538 |
|
|
li r23,0 |
| 539 |
|
|
mr r24,r3 |
| 540 |
|
|
lwz r25,XLM_68K_R25(0) // MSB of SR |
| 541 |
|
|
li r26,0 |
| 542 |
|
|
li r28,0 // VBR |
| 543 |
|
|
lwz r29,0x74(r31) // Pointer to opcode table |
| 544 |
|
|
lwz r30,0x78(r31) // Address of emulator |
| 545 |
|
|
|
| 546 |
|
|
// Push return address (points to EXEC_RETURN opcode) on stack |
| 547 |
|
|
li r0,XLM_EXEC_RETURN_OPCODE |
| 548 |
|
|
stwu r0,-4(r1) |
| 549 |
|
|
|
| 550 |
|
|
// Reentering 68k emulator |
| 551 |
|
|
li r0,MODE_68K |
| 552 |
|
|
stw r0,XLM_RUN_MODE(0) |
| 553 |
|
|
|
| 554 |
|
|
// Set r0 to 0 for 68k emulator |
| 555 |
|
|
li r0,0 |
| 556 |
|
|
|
| 557 |
|
|
// Execute 68k opcode |
| 558 |
|
|
lha r27,0(r24) |
| 559 |
|
|
rlwimi r29,r27,3,13,28 |
| 560 |
|
|
lhau r27,2(r24) |
| 561 |
|
|
mtlr r29 |
| 562 |
|
|
blr |
| 563 |
|
|
|
| 564 |
|
|
|
| 565 |
|
|
/* |
| 566 |
|
|
* uint32 call_macos1(uint32 tvect{r3}, uint32 arg1{r4}) ... - Call MacOS routines |
| 567 |
|
|
*/ |
| 568 |
|
|
|
| 569 |
|
|
ASM_MACRO_START prolog |
| 570 |
|
|
mflr r0 |
| 571 |
|
|
stw r0,4(r1) |
| 572 |
|
|
stwu r1,-64(r1) |
| 573 |
|
|
ASM_MACRO_END |
| 574 |
|
|
|
| 575 |
|
|
ASM_MACRO_START epilog |
| 576 |
|
|
lwz r13,XLM_TOC(0) |
| 577 |
|
|
lwz r0,64+4(r1) |
| 578 |
|
|
mtlr r0 |
| 579 |
|
|
addi r1,r1,64 |
| 580 |
|
|
blr |
| 581 |
|
|
ASM_MACRO_END |
| 582 |
|
|
|
| 583 |
|
|
ASM_GLOBAL_DIRECTIVE C_SYMBOL_NAME(call_macos) |
| 584 |
|
|
C_SYMBOL_NAME(call_macos): |
| 585 |
|
|
prolog |
| 586 |
|
|
lwz r0,0(r3) // Get routine address |
| 587 |
|
|
lwz r2,4(r3) // Load TOC pointer |
| 588 |
|
|
mtctr r0 |
| 589 |
|
|
bctrl |
| 590 |
|
|
epilog |
| 591 |
|
|
|
| 592 |
|
|
ASM_GLOBAL_DIRECTIVE C_SYMBOL_NAME(call_macos1) |
| 593 |
|
|
C_SYMBOL_NAME(call_macos1): |
| 594 |
|
|
prolog |
| 595 |
|
|
lwz r0,0(r3) // Get routine address |
| 596 |
|
|
lwz r2,4(r3) // Load TOC pointer |
| 597 |
|
|
mtctr r0 |
| 598 |
|
|
mr r3,r4 |
| 599 |
|
|
bctrl |
| 600 |
|
|
epilog |
| 601 |
|
|
|
| 602 |
|
|
ASM_GLOBAL_DIRECTIVE C_SYMBOL_NAME(call_macos2) |
| 603 |
|
|
C_SYMBOL_NAME(call_macos2): |
| 604 |
|
|
prolog |
| 605 |
|
|
lwz r0,0(r3) // Get routine address |
| 606 |
|
|
lwz r2,4(r3) // Load TOC pointer |
| 607 |
|
|
mtctr r0 |
| 608 |
|
|
mr r3,r4 |
| 609 |
|
|
mr r4,r5 |
| 610 |
|
|
bctrl |
| 611 |
|
|
epilog |
| 612 |
|
|
|
| 613 |
|
|
ASM_GLOBAL_DIRECTIVE C_SYMBOL_NAME(call_macos3) |
| 614 |
|
|
C_SYMBOL_NAME(call_macos3): |
| 615 |
|
|
prolog |
| 616 |
|
|
lwz r0,0(r3) // Get routine address |
| 617 |
|
|
lwz r2,4(r3) // Load TOC pointer |
| 618 |
|
|
mtctr r0 |
| 619 |
|
|
mr r3,r4 |
| 620 |
|
|
mr r4,r5 |
| 621 |
|
|
mr r5,r6 |
| 622 |
|
|
bctrl |
| 623 |
|
|
epilog |
| 624 |
|
|
|
| 625 |
|
|
ASM_GLOBAL_DIRECTIVE C_SYMBOL_NAME(call_macos4) |
| 626 |
|
|
C_SYMBOL_NAME(call_macos4): |
| 627 |
|
|
prolog |
| 628 |
|
|
lwz r0,0(r3) // Get routine address |
| 629 |
|
|
lwz r2,4(r3) // Load TOC pointer |
| 630 |
|
|
mtctr r0 |
| 631 |
|
|
mr r3,r4 |
| 632 |
|
|
mr r4,r5 |
| 633 |
|
|
mr r5,r6 |
| 634 |
|
|
mr r6,r7 |
| 635 |
|
|
bctrl |
| 636 |
|
|
epilog |
| 637 |
|
|
|
| 638 |
|
|
ASM_GLOBAL_DIRECTIVE C_SYMBOL_NAME(call_macos5) |
| 639 |
|
|
C_SYMBOL_NAME(call_macos5): |
| 640 |
|
|
prolog |
| 641 |
|
|
lwz r0,0(r3) // Get routine address |
| 642 |
|
|
lwz r2,4(r3) // Load TOC pointer |
| 643 |
|
|
mtctr r0 |
| 644 |
|
|
mr r3,r4 |
| 645 |
|
|
mr r4,r5 |
| 646 |
|
|
mr r5,r6 |
| 647 |
|
|
mr r6,r7 |
| 648 |
|
|
mr r7,r8 |
| 649 |
|
|
bctrl |
| 650 |
|
|
epilog |
| 651 |
|
|
|
| 652 |
|
|
ASM_GLOBAL_DIRECTIVE C_SYMBOL_NAME(call_macos6) |
| 653 |
|
|
C_SYMBOL_NAME(call_macos6): |
| 654 |
|
|
prolog |
| 655 |
|
|
lwz r0,0(r3) // Get routine address |
| 656 |
|
|
lwz r2,4(r3) // Load TOC pointer |
| 657 |
|
|
mtctr r0 |
| 658 |
|
|
mr r3,r4 |
| 659 |
|
|
mr r4,r5 |
| 660 |
|
|
mr r5,r6 |
| 661 |
|
|
mr r6,r7 |
| 662 |
|
|
mr r7,r8 |
| 663 |
|
|
mr r8,r9 |
| 664 |
|
|
bctrl |
| 665 |
|
|
epilog |
| 666 |
|
|
|
| 667 |
|
|
ASM_GLOBAL_DIRECTIVE C_SYMBOL_NAME(call_macos7) |
| 668 |
|
|
C_SYMBOL_NAME(call_macos7): |
| 669 |
|
|
prolog |
| 670 |
|
|
lwz r0,0(r3) // Get routine address |
| 671 |
|
|
lwz r2,4(r3) // Load TOC pointer |
| 672 |
|
|
mtctr r0 |
| 673 |
|
|
mr r3,r4 |
| 674 |
|
|
mr r4,r5 |
| 675 |
|
|
mr r5,r6 |
| 676 |
|
|
mr r6,r7 |
| 677 |
|
|
mr r7,r8 |
| 678 |
|
|
mr r8,r9 |
| 679 |
|
|
mr r9,r10 |
| 680 |
|
|
bctrl |
| 681 |
|
|
epilog |
| 682 |
|
|
|
| 683 |
|
|
|
| 684 |
|
|
/* |
| 685 |
|
|
* Native resource manager patches |
| 686 |
|
|
*/ |
| 687 |
|
|
|
| 688 |
|
|
ASM_GLOBAL_DIRECTIVE C_SYMBOL_NAME(get_resource) |
| 689 |
|
|
C_SYMBOL_NAME(get_resource): |
| 690 |
|
|
// Create stack frame |
| 691 |
|
|
mflr r0 |
| 692 |
|
|
stw r0,8(r1) |
| 693 |
|
|
stwu r1,-(56+12)(r1) |
| 694 |
|
|
|
| 695 |
|
|
// Save type/ID |
| 696 |
|
|
stw r3,56(r1) |
| 697 |
|
|
stw r4,56+4(r1) |
| 698 |
|
|
|
| 699 |
|
|
// Call old routine |
| 700 |
|
|
lwz r0,XLM_GET_RESOURCE(0) |
| 701 |
|
|
lwz r2,XLM_RES_LIB_TOC(0) |
| 702 |
|
|
mtctr r0 |
| 703 |
|
|
bctrl |
| 704 |
|
|
stw r3,56+8(r1) // Save handle |
| 705 |
|
|
|
| 706 |
|
|
// Call CheckLoad |
| 707 |
|
|
lwz r3,56(r1) |
| 708 |
|
|
lha r4,56+6(r1) |
| 709 |
|
|
lwz r5,56+8(r1) |
| 710 |
|
|
bl C_SYMBOL_NAME(check_load_invoc) |
| 711 |
|
|
lwz r3,56+8(r1) // Restore handle |
| 712 |
|
|
|
| 713 |
|
|
// Return to caller |
| 714 |
|
|
lwz r0,56+12+8(r1) |
| 715 |
|
|
mtlr r0 |
| 716 |
|
|
addi r1,r1,56+12 |
| 717 |
|
|
blr |
| 718 |
|
|
|
| 719 |
|
|
ASM_GLOBAL_DIRECTIVE C_SYMBOL_NAME(get_1_resource) |
| 720 |
|
|
C_SYMBOL_NAME(get_1_resource): |
| 721 |
|
|
// Create stack frame |
| 722 |
|
|
mflr r0 |
| 723 |
|
|
stw r0,8(r1) |
| 724 |
|
|
stwu r1,-(56+12)(r1) |
| 725 |
|
|
|
| 726 |
|
|
// Save type/ID |
| 727 |
|
|
stw r3,56(r1) |
| 728 |
|
|
stw r4,56+4(r1) |
| 729 |
|
|
|
| 730 |
|
|
// Call old routine |
| 731 |
|
|
lwz r0,XLM_GET_1_RESOURCE(0) |
| 732 |
|
|
lwz r2,XLM_RES_LIB_TOC(0) |
| 733 |
|
|
mtctr r0 |
| 734 |
|
|
bctrl |
| 735 |
|
|
stw r3,56+8(r1) // Save handle |
| 736 |
|
|
|
| 737 |
|
|
// Call CheckLoad |
| 738 |
|
|
lwz r3,56(r1) |
| 739 |
|
|
lha r4,56+6(r1) |
| 740 |
|
|
lwz r5,56+8(r1) |
| 741 |
|
|
bl C_SYMBOL_NAME(check_load_invoc) |
| 742 |
|
|
lwz r3,56+8(r1) // Restore handle |
| 743 |
|
|
|
| 744 |
|
|
// Return to caller |
| 745 |
|
|
lwz r0,56+12+8(r1) |
| 746 |
|
|
mtlr r0 |
| 747 |
|
|
addi r1,r1,56+12 |
| 748 |
|
|
blr |
| 749 |
|
|
|
| 750 |
|
|
ASM_GLOBAL_DIRECTIVE C_SYMBOL_NAME(get_ind_resource) |
| 751 |
|
|
C_SYMBOL_NAME(get_ind_resource): |
| 752 |
|
|
// Create stack frame |
| 753 |
|
|
mflr r0 |
| 754 |
|
|
stw r0,8(r1) |
| 755 |
|
|
stwu r1,-(56+12)(r1) |
| 756 |
|
|
|
| 757 |
|
|
// Save type/index |
| 758 |
|
|
stw r3,56(r1) |
| 759 |
|
|
stw r4,56+4(r1) |
| 760 |
|
|
|
| 761 |
|
|
// Call old routine |
| 762 |
|
|
lwz r0,XLM_GET_IND_RESOURCE(0) |
| 763 |
|
|
lwz r2,XLM_RES_LIB_TOC(0) |
| 764 |
|
|
mtctr r0 |
| 765 |
|
|
bctrl |
| 766 |
|
|
stw r3,56+8(r1) // Save handle |
| 767 |
|
|
|
| 768 |
|
|
// Call CheckLoad |
| 769 |
|
|
lwz r3,56(r1) |
| 770 |
|
|
lha r4,56+6(r1) |
| 771 |
|
|
lwz r5,56+8(r1) |
| 772 |
|
|
bl C_SYMBOL_NAME(check_load_invoc) |
| 773 |
|
|
lwz r3,56+8(r1) // Restore handle |
| 774 |
|
|
|
| 775 |
|
|
// Return to caller |
| 776 |
|
|
lwz r0,56+12+8(r1) |
| 777 |
|
|
mtlr r0 |
| 778 |
|
|
addi r1,r1,56+12 |
| 779 |
|
|
blr |
| 780 |
|
|
|
| 781 |
|
|
ASM_GLOBAL_DIRECTIVE C_SYMBOL_NAME(get_1_ind_resource) |
| 782 |
|
|
C_SYMBOL_NAME(get_1_ind_resource): |
| 783 |
|
|
// Create stack frame |
| 784 |
|
|
mflr r0 |
| 785 |
|
|
stw r0,8(r1) |
| 786 |
|
|
stwu r1,-(56+12)(r1) |
| 787 |
|
|
|
| 788 |
|
|
// Save type/index |
| 789 |
|
|
stw r3,56(r1) |
| 790 |
|
|
stw r4,56+4(r1) |
| 791 |
|
|
|
| 792 |
|
|
// Call old routine |
| 793 |
|
|
lwz r0,XLM_GET_1_IND_RESOURCE(0) |
| 794 |
|
|
lwz r2,XLM_RES_LIB_TOC(0) |
| 795 |
|
|
mtctr r0 |
| 796 |
|
|
bctrl |
| 797 |
|
|
stw r3,56+8(r1) // Save handle |
| 798 |
|
|
|
| 799 |
|
|
// Call CheckLoad |
| 800 |
|
|
lwz r3,56(r1) |
| 801 |
|
|
lha r4,56+6(r1) |
| 802 |
|
|
lwz r5,56+8(r1) |
| 803 |
|
|
bl C_SYMBOL_NAME(check_load_invoc) |
| 804 |
|
|
lwz r3,56+8(r1) // Restore handle |
| 805 |
|
|
|
| 806 |
|
|
// Return to caller |
| 807 |
|
|
lwz r0,56+12+8(r1) |
| 808 |
|
|
mtlr r0 |
| 809 |
|
|
addi r1,r1,56+12 |
| 810 |
|
|
blr |
| 811 |
|
|
|
| 812 |
|
|
ASM_GLOBAL_DIRECTIVE C_SYMBOL_NAME(r_get_resource) |
| 813 |
|
|
C_SYMBOL_NAME(r_get_resource): |
| 814 |
|
|
// Create stack frame |
| 815 |
|
|
mflr r0 |
| 816 |
|
|
stw r0,8(r1) |
| 817 |
|
|
stwu r1,-(56+12)(r1) |
| 818 |
|
|
|
| 819 |
|
|
// Save type/ID |
| 820 |
|
|
stw r3,56(r1) |
| 821 |
|
|
stw r4,56+4(r1) |
| 822 |
|
|
|
| 823 |
|
|
// Call old routine |
| 824 |
|
|
lwz r0,XLM_R_GET_RESOURCE(0) |
| 825 |
|
|
lwz r2,XLM_RES_LIB_TOC(0) |
| 826 |
|
|
mtctr r0 |
| 827 |
|
|
bctrl |
| 828 |
|
|
stw r3,56+8(r1) // Save handle |
| 829 |
|
|
|
| 830 |
|
|
// Call CheckLoad |
| 831 |
|
|
lwz r3,56(r1) |
| 832 |
|
|
lha r4,56+6(r1) |
| 833 |
|
|
lwz r5,56+8(r1) |
| 834 |
|
|
bl C_SYMBOL_NAME(check_load_invoc) |
| 835 |
|
|
lwz r3,56+8(r1) // Restore handle |
| 836 |
|
|
|
| 837 |
|
|
// Return to caller |
| 838 |
|
|
lwz r0,56+12+8(r1) |
| 839 |
|
|
mtlr r0 |
| 840 |
|
|
addi r1,r1,56+12 |
| 841 |
|
|
blr |
| 842 |
|
|
|
| 843 |
|
|
|
| 844 |
|
|
/* |
| 845 |
|
|
* void ppc_interrupt(uint32 entry{r3}, uint32 kernel_data{r4}) - Execute PPC interrupt |
| 846 |
|
|
*/ |
| 847 |
|
|
|
| 848 |
|
|
ASM_GLOBAL_DIRECTIVE C_SYMBOL_NAME(ppc_interrupt) |
| 849 |
|
|
C_SYMBOL_NAME(ppc_interrupt): |
| 850 |
|
|
mflr r0 |
| 851 |
|
|
stw r0,4(r1) |
| 852 |
|
|
stwu r1,-64(r1) |
| 853 |
|
|
|
| 854 |
|
|
// Get address of return routine |
| 855 |
|
|
bl 1f |
| 856 |
|
|
|
| 857 |
|
|
// Return routine |
| 858 |
|
|
lwz r0,64+4(r1) |
| 859 |
|
|
mtlr r0 |
| 860 |
|
|
addi r1,r1,64 |
| 861 |
|
|
blr |
| 862 |
|
|
|
| 863 |
|
|
// Prepare registers for nanokernel interrupt routine |
| 864 |
|
|
1: mtctr r1 |
| 865 |
|
|
mr r1,r4 |
| 866 |
|
|
stw r6,0x018(r1) |
| 867 |
|
|
mfctr r6 |
| 868 |
|
|
stw r6,0x004(r1) |
| 869 |
|
|
lwz r6,0x65c(r1) |
| 870 |
|
|
stw r7,0x13c(r6) |
| 871 |
|
|
stw r8,0x144(r6) |
| 872 |
|
|
stw r9,0x14c(r6) |
| 873 |
|
|
stw r10,0x154(r6) |
| 874 |
|
|
stw r11,0x15c(r6) |
| 875 |
|
|
stw r12,0x164(r6) |
| 876 |
|
|
stw r13,0x16c(r6) |
| 877 |
|
|
|
| 878 |
|
|
mflr r10 |
| 879 |
|
|
mfcr r13 |
| 880 |
|
|
lwz r7,0x660(r1) |
| 881 |
|
|
mflr r12 |
| 882 |
|
|
rlwimi. r7,r7,8,0,0 |
| 883 |
|
|
li r11,0 |
| 884 |
|
|
ori r11,r11,0xf072 // MSR (SRR1) |
| 885 |
|
|
mtcrf 0x70,r11 |
| 886 |
|
|
li r8,0 |
| 887 |
|
|
|
| 888 |
|
|
// Enter nanokernel |
| 889 |
|
|
mtlr r3 |
| 890 |
|
|
blr |
