Initial commit

arm9/source/patches/platform/akrpg/AKRPGLoaderPlatform.h

@@ -0,0 +1,64 @@
+#pragma once
+#include "common.h"
+#include "../acekard-common/IoRPGLoaderPlatform.h"
+#include "akrpgReadSdAsm.h"
+#include "akrpgSdReadSectorAsm.h"
+#include "akrpgWriteSdAsm.h"
+
+/// @brief Implementation of LoaderPlatform for the Acekard RPG SD card.
+class AKRPGLoaderPlatform : public IoRPGLoaderPlatform
+{
+private:
+    enum
+    {
+        IORPG_CMD_SDIO_BYTE = 0xD5
+    };
+
+public:
+    AKRPGLoaderPlatform() : IoRPGLoaderPlatform(IORPG_CMD_SDIO_BYTE) { }
+
+    const SdReadPatchCode* CreateSdReadPatchCode(
+        PatchCodeCollection& patchCodeCollection, PatchHeap& patchHeap) const override
+    {
+        return patchCodeCollection.GetOrAddSharedPatchCode([&]
+        {
+            auto* waitForStatePatchCode = patchCodeCollection.GetOrAddSharedPatchCode([&]
+            {
+                return new ioRPGSDWaitForStatePatchCode(patchHeap);
+            });
+            return new AKRPGReadSdPatchCode(patchHeap,
+                patchCodeCollection.GetOrAddSharedPatchCode([&]
+                {
+                    return new ioRPGSendSDIOCommandPatchCode(patchHeap);
+                }),
+                patchCodeCollection.GetOrAddSharedPatchCode([&]
+                {
+                    return new AKRPGSDReadSectorPatchCode(patchHeap, waitForStatePatchCode);
+                }),
+                waitForStatePatchCode);
+        });
+    }
+
+    const SdWritePatchCode* CreateSdWritePatchCode(
+        PatchCodeCollection& patchCodeCollection, PatchHeap& patchHeap) const override
+    {
+        return patchCodeCollection.GetOrAddSharedPatchCode([&]
+        {
+            return new AKRPGWriteSdPatchCode(patchHeap,
+                patchCodeCollection.GetOrAddSharedPatchCode([&]
+                {
+                    return new ioRPGSendSDIOCommandPatchCode(patchHeap);
+                }),
+                patchCodeCollection.GetOrAddSharedPatchCode([&]
+                {
+                    return new ioRPGSDWaitForStatePatchCode(patchHeap);
+                }));
+        });
+    }
+
+    void PatchSdscShift(void) const override
+    {
+        akrpg_readSd_sdsc_shift = THUMB_MOVS_REG(THUMB_R4, THUMB_R0);
+        akrpg_writeSd_sdsc_shift = THUMB_MOVS_REG(THUMB_R7, THUMB_R0);
+    }
+};

arm9/source/patches/platform/akrpg/akrpgReadSdAsm.h

@@ -0,0 +1,36 @@
+#pragma once
+#include "sections.h"
+#include "thumbInstructions.h"
+#include "akrpgSdReadSectorAsm.h"
+#include "../SdReadPatchCode.h"
+#include "../acekard-common/iorpgSendSdioCommandAsm.h"
+#include "../acekard-common/iorpgSdWaitForStateAsm.h"
+
+DEFINE_SECTION_SYMBOLS(akrpg_readsd);
+
+extern "C" void akrpg_readSd(u32 srcSector, void* dst, u32 sectorCount);
+
+extern u32 akrpg_readSd_sendSdioCommand_address;
+extern u32 akrpg_readSd_sdReadSector_address;
+extern u32 akrpg_readSd_sdWaitForState_address;
+extern u16 akrpg_readSd_sdsc_shift;
+
+class AKRPGReadSdPatchCode : public SdReadPatchCode
+{
+public:
+    explicit AKRPGReadSdPatchCode(PatchHeap& patchHeap,
+        const ioRPGSendSDIOCommandPatchCode* iorpgSendSdioCommandPatchCode,
+        const AKRPGSDReadSectorPatchCode* akrpgSdReadSectorPatchCode,
+        const ioRPGSDWaitForStatePatchCode* iorpgSdWaitForStatePatchCode)
+        : SdReadPatchCode(SECTION_START(akrpg_readsd), SECTION_SIZE(akrpg_readsd), patchHeap)
+    {
+        akrpg_readSd_sendSdioCommand_address = (u32)iorpgSendSdioCommandPatchCode->GetSendSdioCommandFunction();
+        akrpg_readSd_sdReadSector_address = (u32)akrpgSdReadSectorPatchCode->GetSDReadSectorFunction();
+        akrpg_readSd_sdWaitForState_address = (u32)iorpgSdWaitForStatePatchCode->GetSDWaitForStateFunction();
+    }
+
+    const SdReadFunc GetSdReadFunction() const override
+    {
+        return (const SdReadFunc)GetAddressAtTarget((void*)akrpg_readSd);
+    }
+};

arm9/source/patches/platform/akrpg/akrpgReadSdAsm.s

@@ -0,0 +1,69 @@
+.cpu arm7tdmi
+.syntax unified
+.section "akrpg_readsd", "ax"
+.thumb
+
+// r0 = src sector
+// r1 = dst
+// r2 = sector count
+.global akrpg_readSd
+.type akrpg_readSd, %function
+akrpg_readSd:
+    push {r4,lr}
+
+    ldr r4, =0x040001A0
+    movs r3, #0x80
+    strb r3, [r4,#1]
+
+.global akrpg_readSd_sdsc_shift
+akrpg_readSd_sdsc_shift:
+    lsls r4, r0, #9
+
+    push {r0-r1}
+
+    ldr r0, =0x120004D5
+    movs r1, r4
+    ldr r3, akrpg_readSd_sendSdioCommand_address
+    bl blx_r3
+
+    // Wait for SD state
+    movs r0, #0
+    movs r1, #7
+    ldr r3, akrpg_readSd_sdWaitForState_address
+    bl blx_r3
+
+    pop {r0-r1}
+
+    // Read sectors. Parameters identical to readSd
+    ldr r3, akrpg_readSd_sdReadSector_address
+    bl blx_r3
+
+    // Send CMD12 == STOP_TRANSMISSION
+    push {r0-r1}
+    ldr r0, =0x0C0001D5
+    movs r1, #0
+    ldr r3, akrpg_readSd_sendSdioCommand_address
+    bl blx_r3
+
+    pop {r0-r1,r4,pc}
+
+blx_r3:
+    bx r3
+
+.balign 4
+
+.global akrpg_readSd_sendSdioCommand_address
+akrpg_readSd_sendSdioCommand_address:
+    .word 0
+
+.global akrpg_readSd_sdReadSector_address
+akrpg_readSd_sdReadSector_address:
+    .word 0
+
+.global akrpg_readSd_sdWaitForState_address
+akrpg_readSd_sdWaitForState_address:
+    .word 0
+
+.pool
+
+.end

arm9/source/patches/platform/akrpg/akrpgSdReadSectorAsm.h

@@ -0,0 +1,26 @@
+#pragma once
+#include "sections.h"
+#include "thumbInstructions.h"
+#include "../acekard-common/iorpgSdWaitForStateAsm.h"
+
+DEFINE_SECTION_SYMBOLS(akrpg_sdreadsector);
+
+extern "C" void akrpg_sdReadSector(u32 srcSector, void* dst, u32 sectorCount);
+
+extern u32 akrpg_sdReadSector_sdWaitForState_address;
+
+class AKRPGSDReadSectorPatchCode : public PatchCode
+{
+public:
+    explicit AKRPGSDReadSectorPatchCode(PatchHeap& patchHeap,
+        const ioRPGSDWaitForStatePatchCode* iorpgSdWaitForStatePatchCode)
+        : PatchCode(SECTION_START(akrpg_sdreadsector), SECTION_SIZE(akrpg_sdreadsector), patchHeap)
+    {
+        akrpg_sdReadSector_sdWaitForState_address = (u32)iorpgSdWaitForStatePatchCode->GetSDWaitForStateFunction();
+    }
+
+    const void* GetSDReadSectorFunction() const
+    {
+        return GetAddressAtTarget((void*)akrpg_sdReadSector);
+    }
+};

arm9/source/patches/platform/akrpg/akrpgSdReadSectorAsm.s

@@ -0,0 +1,67 @@
+.cpu arm7tdmi
+.syntax unified
+.section "akrpg_sdreadsector", "ax"
+.thumb
+
+// r0 = src sector
+// r1 = dst
+// r2 = sector count
+.global akrpg_sdReadSector
+.type akrpg_sdReadSector, %function
+akrpg_sdReadSector:
+    push {r4-r5,lr}
+
+    ldr r4, =0x040001A0
+    ldr r5, =0x04100010
+
+sector_loop:
+    // NOW we can start reading things
+    movs r3, #0xB7
+    str r3, [r4,#0x8]
+    // The full CMD is B7 00 00 00 00 13 00 00
+    // If we use 0x1300 and str, then it goes into the expected place
+    movs r3, #0x13
+    lsls r3, r3, #8
+    str r3, [r4,#0xC]
+
+    ldr r3, =0xA1406004
+    str r3, [r4,#4]
+
+akrpg_sdReadSector_read_loop:
+    ldrb r3, [r4,#6]
+    lsrs r3, r3, #8 // check if data is ready
+    bcc akrpg_sdReadSector_read_loop_check_transfer_end // if not skip reading
+
+    ldr r3, [r5]
+    stmia r1!, {r3}
+
+akrpg_sdReadSector_read_loop_check_transfer_end:
+    ldrb r3, [r4,#7]
+    lsrs r3, r3, #8 // check if transfer is done
+    bcs akrpg_sdReadSector_read_loop
+
+    // Wait for SD state
+    push {r0-r1}
+    movs r0, #0
+    movs r1, #7
+    ldr r3, akrpg_sdReadSector_sdWaitForState_address
+    bl blx_r3
+    pop {r0-r1}
+
+    subs r2, #1
+    bne sector_loop
+
+    pop {r4-r5,pc}
+
+blx_r3:
+    bx r3
+
+.balign 4
+
+.global akrpg_sdReadSector_sdWaitForState_address
+akrpg_sdReadSector_sdWaitForState_address:
+    .word 0
+
+.pool
+
+.end

arm9/source/patches/platform/akrpg/akrpgWriteSdAsm.h

@@ -0,0 +1,32 @@
+#pragma once
+#include "sections.h"
+#include "thumbInstructions.h"
+#include "../SdWritePatchCode.h"
+#include "../acekard-common/iorpgSendSdioCommandAsm.h"
+#include "../acekard-common/iorpgSdWaitForStateAsm.h"
+
+DEFINE_SECTION_SYMBOLS(akrpg_writesd);
+
+extern "C" void akrpg_writeSd(u32 srcSector, void* dst, u32 sectorCount);
+
+extern u32 akrpg_writeSd_sendSdioCommand_address;
+extern u32 akrpg_writeSd_sdWaitForState_address;
+extern u16 akrpg_writeSd_sdsc_shift;
+
+class AKRPGWriteSdPatchCode : public SdWritePatchCode
+{
+public:
+    explicit AKRPGWriteSdPatchCode(PatchHeap& patchHeap,
+        const ioRPGSendSDIOCommandPatchCode* iorpgSendSdioCommandPatchCode,
+        const ioRPGSDWaitForStatePatchCode* iorpgSdWaitForStatePatchCode)
+        : SdWritePatchCode(SECTION_START(akrpg_writesd), SECTION_SIZE(akrpg_writesd), patchHeap)
+    {
+        akrpg_writeSd_sendSdioCommand_address = (u32)iorpgSendSdioCommandPatchCode->GetSendSdioCommandFunction();
+        akrpg_writeSd_sdWaitForState_address = (u32)iorpgSdWaitForStatePatchCode->GetSDWaitForStateFunction();
+    }
+
+    const SdWriteFunc GetSdWriteFunction() const override
+    {
+        return (const SdWriteFunc)GetAddressAtTarget((void*)akrpg_writeSd);
+    }
+};

arm9/source/patches/platform/akrpg/akrpgWriteSdAsm.s

@@ -0,0 +1,81 @@
+.cpu arm7tdmi
+.syntax unified
+.section "akrpg_writesd", "ax"
+.thumb
+
+// r0 = dst sector
+// r1 = src
+// r2 = sector count
+.global akrpg_writeSd
+.type akrpg_writeSd, %function
+akrpg_writeSd:
+    push {r4-r7,lr}
+
+    ldr r4, =0x040001A0
+    movs r3, #0x80
+    strb r3, [r4,#1]
+
+sector_loop:
+.global akrpg_writeSd_sdsc_shift
+akrpg_writeSd_sdsc_shift:
+    lsls r7, r0, #9
+
+    push {r0-r1}
+    // SDIO cmd
+    ldr r0, =0x180005D5
+    // param
+    movs r1, r7
+    ldr r6, akrpg_writeSd_sendSdioCommand_address
+    bl blx_r6
+    pop {r0-r1}
+
+    // NOW we can start writing things
+    movs r7, #1
+    lsls r7, r7, #9
+akrpg_writeSd_block_write_loop:
+    // start copy to MCCMD1
+    ldmia r1!, {r5, r6}
+    str r5, [r4, #0x8]
+    str r6, [r4, #0xc]
+
+    ldr r3, =0xA0406000
+    str r3, [r4,#4]
+
+akrpg_writeSd_block_write_wait_busy:
+    ldr r3, [r4,#4]
+    cmp r3, #0
+    blt akrpg_writeSd_block_write_wait_busy
+
+    subs r7, r7, #8
+    bne akrpg_writeSd_block_write_loop
+
+    push {r0-r1}
+    // Wait for SD state
+    movs r0, #0
+    movs r1, #0
+    ldr r6, akrpg_writeSd_sdWaitForState_address
+    bl blx_r6
+    pop {r0-r1}
+
+    adds r0, #1
+    subs r2, #1
+    bne sector_loop
+
+    pop {r4-r7,pc}
+
+blx_r6:
+    bx r6
+
+.balign 4
+
+.global akrpg_writeSd_sendSdioCommand_address
+akrpg_writeSd_sendSdioCommand_address:
+    .word 0
+
+.global akrpg_writeSd_sdWaitForState_address
+akrpg_writeSd_sdWaitForState_address:
+    .word 0
+
+.pool
+
+.end