2020-06-02 12:44:34 -04:00
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.rsp
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.include "rsp/rsp_defs.inc"
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// This file assumes CODE_FILE is set on the command line
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.create CODE_FILE, 0x04001000
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2020-12-03 14:26:38 -05:00
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.if defined(VERSION_JP) || defined(VERSION_US)
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2020-06-02 12:44:34 -04:00
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ori $1, $1, 0x0001
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.endif
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j boot_04001068
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addi $1, $zero, OSTask_addr
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boot_load_ucode:
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lw $2, OSTask_ucode($1)
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addi $3, $zero, 0x0f7f // hard-coded length = 0xF80
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addi $7, $zero, 0x1080 // hard-coded address = 0x1080
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mtc0 $7, SP_MEM_ADDR
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mtc0 $2, SP_DRAM_ADDR
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mtc0 $3, SP_RD_LEN
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boot_ucode_dma_busy:
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mfc0 $4, SP_DMA_BUSY
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bne $4, $zero, boot_ucode_dma_busy
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nop
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jal check_yielded
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nop
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jr $7 // jump to the loaded ucode
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mtc0 $zero, SP_SEMAPHORE // clear semaphore
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check_yielded:
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mfc0 $8, SP_STATUS
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andi $8, $8, 0x0080 // yield signal is set
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bne $8, $zero, boot_04001054
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nop
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jr ra
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boot_04001054:
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mtc0 $zero, SP_SEMAPHORE // clear semaphore
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ori $8, $zero, 0x5200 // clear yield, set yielded, set taskdone?
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mtc0 $8, SP_STATUS
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break // halt RSP and set SP_STATUS_BROKE
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nop
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boot_04001068:
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lw $2, OSTask_flags($1)
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andi $2, $2, OS_TASK_DP_WAIT
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beq $2, $zero, boot_load_data
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nop
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jal check_yielded
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nop
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mfc0 $2, DPC_STATUS
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andi $2, $2, DPC_STATUS_DMA_BUSY
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bgtz $2, check_yielded
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nop
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boot_load_data:
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lw $2, OSTask_ucode_data($1)
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lw $3, OSTask_ucode_data_size($1)
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addi $3, $3, -1
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boot_dma_not_full:
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mfc0 $30, SP_DMA_FULL
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bne $30, $zero, boot_dma_not_full
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nop
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mtc0 $zero, SP_MEM_ADDR // ucode_data store at base of DMEM
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mtc0 $2, SP_DRAM_ADDR
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mtc0 $3, SP_RD_LEN
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boot_data_dma_busy:
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mfc0 $4, SP_DMA_BUSY
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bne $4, $zero, boot_data_dma_busy
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nop
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jal check_yielded
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nop
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j boot_load_ucode
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nop
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.close // CODE_FILE
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