diff options
Diffstat (limited to 'asm/libgcnmultiboot.s')
| -rw-r--r-- | asm/libgcnmultiboot.s | 136 |
1 files changed, 68 insertions, 68 deletions
diff --git a/asm/libgcnmultiboot.s b/asm/libgcnmultiboot.s index 08a61d9bf..e6d1b1eae 100644 --- a/asm/libgcnmultiboot.s +++ b/asm/libgcnmultiboot.s @@ -1,12 +1,12 @@ -; This library can be used to download and execute a multi-boot image from -; a GameCube using the JOY Bus protocol over the link cable. +@ This library can be used to download and execute a multi-boot image from +@ a GameCube using the JOY Bus protocol over the link cable. .set GCMB_STRUCT_BASE_DEST_PTR, 0x20 .set GCMB_STRUCT_CUR_DEST_PTR, 0x24 .set GCMB_STRUCT_SERIAL_INTR_HANDLER, 0x28 thumb_func_start GameCubeMultiBoot_Hash -GameCubeMultiBoot_Hash: ; 82DED70 +GameCubeMultiBoot_Hash: @ 82DED70 push {r4,lr} ldr r4, pool_HashVal eors r3, r1 @@ -26,8 +26,8 @@ $skipEor: thumb_func_end GameCubeMultiBoot_Hash thumb_func_start GameCubeMultiBoot_Main -; void GameCubeMultiBoot_Main(struct GameCubeMultiBoot *mb); -GameCubeMultiBoot_Main: ; 82DED84 +@ void GameCubeMultiBoot_Main(struct GameCubeMultiBoot *mb); +GameCubeMultiBoot_Main: @ 82DED84 ldr r1, [r0, GCMB_STRUCT_SERIAL_INTR_HANDLER] cmp r1, 0 beq _082DEDAA @@ -166,13 +166,13 @@ _082DEE76: pool_HashVal: .4byte 0xa1c1 -pool_Kawa: .ascii "Kawa" ; name of BIOS developer +pool_Kawa: .ascii "Kawa" @ name of BIOS developer pool_NintendoLogo: .4byte RomHeaderNintendoLogo thumb_func_start GameCubeMultiBoot_ExecuteProgram -; void GameCubeMultiBoot_ExecuteProgram(struct GameCubeMultiBoot *mb); -GameCubeMultiBoot_ExecuteProgram: ; 82DEE84 +@ void GameCubeMultiBoot_ExecuteProgram(struct GameCubeMultiBoot *mb); +GameCubeMultiBoot_ExecuteProgram: @ 82DEE84 ldrb r1, [r0, 0x2] cmp r1, 0x2 bne $unableToExecute @@ -187,20 +187,20 @@ $unableToExecute: thumb_func_end GameCubeMultiBoot_ExecuteProgram thumb_func_start GameCubeMultiBoot_Init -; void GameCubeMultiBoot_Init(struct GameCubeMultiBoot *mb); -GameCubeMultiBoot_Init: ; 82DEE98 +@ void GameCubeMultiBoot_Init(struct GameCubeMultiBoot *mb); +GameCubeMultiBoot_Init: @ 82DEE98 ldr r3, pool_InterruptRegs -; Save IME register. +@ Save IME register. ldrh r2, [r3, OFFSET_REG_IME - 0x200] -; Disable interrupts. +@ Disable interrupts. movs r1, 0 strh r1, [r3, OFFSET_REG_IME - 0x200] -; Set the handler to the "Stop" routine. -; Unless the first command that is received is a device reset command, the -; "Stop" routine will be executed and no further commands will be processed. +@ Set the handler to the "Stop" routine. +@ Unless the first command that is received is a device reset command, the +@ "Stop" routine will be executed and no further commands will be processed. adr r3, GcMbIntrHandler_Stop str r3, [r0, GCMB_STRUCT_SERIAL_INTR_HANDLER] @@ -212,7 +212,7 @@ GameCubeMultiBoot_Init: ; 82DEE98 adds r3, r0, 0 adds r3, GCMB_STRUCT_BASE_DEST_PTR -; clear all but the last 3 fields of the struct +@ clear all but the last 3 fields of the struct $clearStructLoop: stm r0!, {r1} cmp r0, r3 @@ -226,43 +226,43 @@ $clearStructLoop: ldr r3, pool_SerialRegs -; Turn off JOY Bus mode. +@ Turn off JOY Bus mode. lsls r0, r3, 10 strh r0, [r3, OFFSET_REG_RCNT - 0x120] -; Turn on JOY Bus mode. +@ Turn on JOY Bus mode. movs r0, 0xC0 lsls r0, 8 strh r0, [r3, OFFSET_REG_RCNT - 0x120] -; Init JOY Bus registers. +@ Init JOY Bus registers. movs r0, 0x47 strh r0, [r3, OFFSET_REG_JOYCNT - 0x120] strh r1, [r3, OFFSET_REG_JOYSTAT - 0x120] ldr r3, pool_InterruptRegs -; Acknowledge serial interrupt. +@ Acknowledge serial interrupt. movs r0, INTR_FLAG_SERIAL strh r0, [r3, OFFSET_REG_IF - 0x200] -; Enable serial interrupt. +@ Enable serial interrupt. ldrh r1, [r3, OFFSET_REG_IE - 0x200] orrs r1, r0 strh r1, [r3, OFFSET_REG_IE - 0x200] -; Restore IME register. +@ Restore IME register. strh r2, [r3, OFFSET_REG_IME - 0x200] bx lr thumb_func_end GameCubeMultiBoot_Init non_word_aligned_thumb_func_start GameCubeMultiBoot_HandleSerialInterrupt -; void GameCubeMultiBoot_HandleSerialInterrupt(struct GameCubeMultiBoot *mb); -GameCubeMultiBoot_HandleSerialInterrupt: ; 82DEEE2 +@ void GameCubeMultiBoot_HandleSerialInterrupt(struct GameCubeMultiBoot *mb); +GameCubeMultiBoot_HandleSerialInterrupt: @ 82DEEE2 ldr r3, pool_SerialRegs -; Acknowledge reset/receive/send flags. +@ Acknowledge reset/receive/send flags. ldrh r1, [r3, OFFSET_REG_JOYCNT - 0x120] strh r1, [r3, OFFSET_REG_JOYCNT - 0x120] @@ -273,16 +273,16 @@ GameCubeMultiBoot_HandleSerialInterrupt: ; 82DEEE2 cmp r2, 0 beq GameCubeMultiBoot_HandleSerialInterruptDone - lsrs r1, 1 ; was a device reset command received? - bcs GameCubeMultiBoot_BeginHandshake ; branch if so + lsrs r1, 1 @ was a device reset command received? + bcs GameCubeMultiBoot_BeginHandshake @ branch if so mov pc, r2 .align 2, 0 -; Zero the status and the interrupt handler pointer. -; Commands from the GameCube will not be processed after this is executed -; unless GameCubeMultiBoot_Init() is called again. +@ Zero the status and the interrupt handler pointer. +@ Commands from the GameCube will not be processed after this is executed +@ unless GameCubeMultiBoot_Init() is called again. GcMbIntrHandler_Stop: movs r2, 0 strh r2, [r3, OFFSET_REG_JOYSTAT - 0x120] @@ -317,27 +317,27 @@ GameCubeMultiBoot_BeginHandshake: .align 2, 0 -GcMbIntrHandler_CheckGameCodeSent: ; 82DEF24 +GcMbIntrHandler_CheckGameCodeSent: @ 82DEF24 lsls r1, 31 - bcc GcMbIntrHandler_Stop ; stop if send failed - bmi GameCubeMultiBoot_CheckHandshakeResponse ; branch if receive is complete + bcc GcMbIntrHandler_Stop @ stop if send failed + bmi GameCubeMultiBoot_CheckHandshakeResponse @ branch if receive is complete -; If the response hasn't been fully received yet, -; check again upon the next interrupt. +@ If the response hasn't been fully received yet, +@ check again upon the next interrupt. adr r2, GcMbIntrHandler_CheckHandshakeResponse b GameCubeMultiBoot_SetInterruptHandler .align 2, 0 -GcMbIntrHandler_CheckHandshakeResponse: ; 82DEF30 - lsrs r1, 1 ; is receive complete? - bcc GcMbIntrHandler_Stop ; stop if not +GcMbIntrHandler_CheckHandshakeResponse: @ 82DEF30 + lsrs r1, 1 @ is receive complete? + bcc GcMbIntrHandler_Stop @ stop if not GameCubeMultiBoot_CheckHandshakeResponse: ldr r1, [r3, OFFSET_REG_JOY_RECV - 0x120] ldr r2, pool_RubyUSAGameCode cmp r1, r2 - bne GcMbIntrHandler_Stop ; stop if the GameCube didn't reply with the same game code + bne GcMbIntrHandler_Stop @ stop if the GameCube didn't reply with the same game code ldrb r1, [r0, 0x3] strb r1, [r0, 0xB] adr r2, GcMbIntrHandler_82DEF44 @@ -345,9 +345,9 @@ GameCubeMultiBoot_CheckHandshakeResponse: .align 2, 0 -GcMbIntrHandler_82DEF44: ; 82DEF44 - lsrs r1, 1 ; is receive complete? - bcc GcMbIntrHandler_Stop ; branch if not +GcMbIntrHandler_82DEF44: @ 82DEF44 + lsrs r1, 1 @ is receive complete? + bcc GcMbIntrHandler_Stop @ branch if not ldr r1, [r3, OFFSET_REG_JOY_RECV - 0x120] lsrs r2, r1, 24 cmp r2, 0xDD @@ -383,18 +383,18 @@ _082DEF72: .align 2, 0 -GcMbIntrHandler_82DEF84: ; 82DEF84 +GcMbIntrHandler_82DEF84: @ 82DEF84 lsls r1, 31 - bcc GcMbIntrHandler_Stop ; stop if send failed - bmi _082DEF94 ; branch if receive is complete + bcc GcMbIntrHandler_Stop @ stop if send failed + bmi _082DEF94 @ branch if receive is complete adr r2, GcMbIntrHandler_82DEF90 b GameCubeMultiBoot_SetInterruptHandler .align 2, 0 -GcMbIntrHandler_82DEF90: ; 82DEF90 - lsrs r1, 1 ; is receive complete? - bcc GcMbIntrHandler_Stop ; branch if not +GcMbIntrHandler_82DEF90: @ 82DEF90 + lsrs r1, 1 @ is receive complete? + bcc GcMbIntrHandler_Stop @ branch if not _082DEF94: ldr r1, [r3, OFFSET_REG_JOY_RECV - 0x120] ldr r2, _082DF034 @@ -415,9 +415,9 @@ _082DEFA6: .align 2, 0 -GcMbIntrHandler_82DEFB4: ; 82DEFB4 - lsrs r1, 1 ; is receive complete? - bcc GcMbIntrHandler_Stop ; branch if not +GcMbIntrHandler_82DEFB4: @ 82DEFB4 + lsrs r1, 1 @ is receive complete? + bcc GcMbIntrHandler_Stop @ branch if not ldr r2, [r0, GCMB_STRUCT_CUR_DEST_PTR] movs r1, 0x4 ands r1, r2 @@ -456,18 +456,18 @@ _082DEFE2: .align 2, 0 -GcMbIntrHandler_82DEFF0: ; 82DEFF0 +GcMbIntrHandler_82DEFF0: @ 82DEFF0 lsls r1, 31 - bcc _082DEFE2 ; branch if send failed - bmi _082DF000 ; branch if receive is complete + bcc _082DEFE2 @ branch if send failed + bmi _082DF000 @ branch if receive is complete adr r2, GcMbIntrHandler_82DEFFC b GameCubeMultiBoot_SetInterruptHandler .align 2, 0 -GcMbIntrHandler_82DEFFC: ; 82DEFFC - lsrs r1, 1 ; is receive complete? - bcc _082DEFE2 ; branch if not +GcMbIntrHandler_82DEFFC: @ 82DEFFC + lsrs r1, 1 @ is receive complete? + bcc _082DEFE2 @ branch if not _082DF000: ldr r1, [r3, OFFSET_REG_JOY_RECV - 0x120] @@ -480,45 +480,45 @@ _082DF000: .align 2, 0 -GcMbIntrHandler_82DF010: ; 82DF010 +GcMbIntrHandler_82DF010: @ 82DF010 b GcMbIntrHandler_Stop thumb_func_end GameCubeMultiBoot_HandleSerialInterrupt non_word_aligned_thumb_func_start GameCubeMultiBoot_Quit -; void GameCubeMultiBoot_Quit(); -GameCubeMultiBoot_Quit: ; 82DF012 +@ void GameCubeMultiBoot_Quit(); +GameCubeMultiBoot_Quit: @ 82DF012 ldr r3, pool_InterruptRegs -; Save IME register. +@ Save IME register. ldrh r2, [r3, OFFSET_REG_IME - 0x200] -; Disable interrupts. +@ Disable interrupts. movs r1, 0 strh r1, [r3, OFFSET_REG_IME - 0x200] ldr r3, pool_SerialRegs -; Acknowledge all JOYCNT flags. +@ Acknowledge all JOYCNT flags. movs r0, 0x7 strh r0, [r3, OFFSET_REG_JOYCNT - 0x120] -; Turn off JOY Bus mode. +@ Turn off JOY Bus mode. lsls r0, r3, 10 - strh r0, [r3, OFFSET_REG_RCNT - 0x120] ; store 0x8000 + strh r0, [r3, OFFSET_REG_RCNT - 0x120] @ store 0x8000 ldr r3, pool_InterruptRegs -; Acknowledge serial interrupt. +@ Acknowledge serial interrupt. movs r0, INTR_FLAG_SERIAL strh r0, [r3, OFFSET_REG_IF - 0x200] -; Disable serial interrupt. +@ Disable serial interrupt. ldrh r1, [r3, OFFSET_REG_IE - 0x200] bics r1, r0 strh r1, [r3, OFFSET_REG_IE - 0x200] -; Restore IME register. +@ Restore IME register. strh r2, [r3, OFFSET_REG_IME - 0x200] bx lr |