// Load at offset 0x80010000

// Compile with

// mips-linux-gnu-gcc -EB -c fakeflash.S -mips4 -mno-abicalls -ffreestanding -o fakeflash.o

// mips-linux-gnu-objcopy -j .text -O binary fakeflash.o fakeflash.bin

//

// When written to the correct address, bcm2dump will recognize this as the `debug` profile,

// and use the functions below. This allows for non-destructive testing of the flash write

// code.

.set noreorder

.equ printf, 0x83f8b0c0

.text

.ascii "DBUG"

// 0x80001004

// int FakeFlashErase(uint32_t offset, uint32_t length)

FakeFlashErase:

addiu $sp, -4

sw $ra, 0($sp)

move $a2, $a1

move $a1, $a0

lui $a0, 0x8001

li $v0, printf

jalr $v0

ori $a0, sErase

and $v0, $a1, 3 // return non-zero on unaligned offset

lw $ra, 0($sp)

jr $ra

addiu $sp, 4

// 0x80001034

// bool FakeFlashWrite(uint32_t buffer, uint32_t offset, uint32_t length)

FakeFlashWrite:

addiu $sp, -4

sw $ra, 0($sp)

move $a3, $a2

move $a2, $a1

move $a1, $a0

lui $a0, 0x8001

li $v0, printf

jalr $v0

ori $a0, sWrite

and $v0, $a2, 3 // return non-zero on unaligned offset

lw $ra, 0($sp)

jr $ra

addiu $sp, 4

// 0x80010068

// bool FakeFlashRead(uint32_t offset, uint32_t buffer, uint32_t length)

FakeFlashRead:

addiu $sp, -4

sw $ra, 0($sp)

move $a3, $a2

move $a2, $a1

move $a1, $a0

lui $a0, 0x8001

li $v0, printf

jalr $v0

ori $a0, sRead

and $v0, $a1, 3 // return non-zero on unaligned offset

lw $ra, 0($sp)

jr $ra

addiu $sp, 4

sErase:

.asciz "FakeFlashErase: off=0x%08x, len=%d\r\n"

sWrite:

.asciz "FakeFlashWrite: off=0x%08x, buf=0x%08x, len=%d\r\n"

sRead:

.asciz "FakeFlashRead: buf=0x%08x, off=0x%08x, len=%d\r\n"