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-rw-r--r--libpsn00b/psxgpu/resetgraph.s363
1 files changed, 0 insertions, 363 deletions
diff --git a/libpsn00b/psxgpu/resetgraph.s b/libpsn00b/psxgpu/resetgraph.s
deleted file mode 100644
index 6327f02..0000000
--- a/libpsn00b/psxgpu/resetgraph.s
+++ /dev/null
@@ -1,363 +0,0 @@
-.set noreorder
-
-.include "hwregs_a.h"
-
-.section .text
-
-.set ISR_STACK_SIZE, 4096
-
-.global ResetGraph # Resets the GPU and installs a
-.type ResetGraph, @function # VSync event handler
-ResetGraph:
- addiu $sp, -8 # C style stack allocation (required if
- sw $ra, 0($sp) # you call BIOS functions from asm)
- sw $a0, 4($sp)
-
- la $a0, resetgraph_msg
- move $a1, $0
- move $a2, $0
- la $a1, _irq_func_table
- la $a2, _custom_exit
- jal printf
- addiu $sp, -16
- addiu $sp, 16
-
- la $a0, sr_msg
- mfc0 $a1, $12
- jal printf
- addiu $sp, -16
- addiu $sp, 16
-
- la $v0, _hooks_installed # Skip installing hooks if this function
- lbu $v0, 0($v0) # has already been called before once
- nop
- bnez $v0, .Lskip_hook_init
- nop
-
- jal EnterCriticalSection # Disable interrupts as LoadExec() keeps
- nop # interrupts enabled when transferring
- # execution to the loaded program
-
- lui $a3, IOBASE # Base address for I/O
-
- lui $v0, 0x3b33 # Enables DMA channel 6 (for ClearOTag)
- ori $v0, 0x3b33 # Enables DMA channel 2
- sw $v0, DMA_DPCR($a3)
- sw $0 , DMA_DICR($a3) # Clear DICR (not needed)
-
- sw $0 , IRQ_MASK($a3) # Clear IRQ settings
-
- la $v0, _hooks_installed # Set installed flag
- li $v1, 0x1
- sb $v1, 0($v0)
-
- la $v0, _vsync_cb_func # Clear VSync callback function
- sw $0 , 0($v0)
-
- la $a1, _vsync_irq_callback # Install VSync interrupt callback
- jal InterruptCallback
- li $a0, 0
-
- jal RestartCallback
- nop
-
- la $a0, cbhooks_msg
- jal printf
- addiu $sp, -16
- addiu $sp, 16
-
- jal _96_remove # Remove CD handling left by the BIOS
- nop
-
- la $a0, abouttoen_msg
- jal printf
- addiu $sp, -16
- addiu $sp, 16
-
- jal ExitCriticalSection # Re-enable interrupts
- nop
-
- la $a0, enableint_msg
- jal printf
- addiu $sp, -16
- addiu $sp, 16
-
-.Lskip_hook_init:
-
- lui $a3, IOBASE
-
- lw $v0, GPU_GP1($a3) # Get video standard
- lui $v1, 0x0010
- and $v0, $v1
- la $v1, _gpu_standard
- beqz $v0, .Lnot_pal
- sw $0 , 0($v1)
- li $v0, 1
- sw $v0, 0($v1)
-.Lnot_pal:
-
- lw $a0, 4($sp) # Get argument value
-
- lui $a3, IOBASE # Set base I/O again (likely destroyed
- # by previous calls)
-
- li $v0, 0x1d00 # Configure timer 1 as Hblank counter
- sw $v0, TIMER1_CTRL($a3) # Set timer 1 value
-
- beq $a0, 1, .Lgpu_init_1
- nop
- beq $a0, 3, .Lgpu_init_3
- nop
-
- sw $0 , GPU_GP1($a3) # Reset the GPU
-
- b .Linit_done
- nop
-
-.Lgpu_init_1:
-
- sw $0 , DMA2_CHCR($a3) # Stop any DMA
-
-.Lgpu_init_3:
-
- li $v0, 0x1 # Reset the command buffer
- sw $v0, GPU_GP1($a3)
-
-.Linit_done:
-
- lw $ra, 0($sp)
- lw $a0, 4($sp) # Return
- jr $ra
- addiu $sp, 8
-
-
-.global VSync # VSync function
-.type VSync, @function
-VSync:
-
- addiu $sp, -12
- sw $ra, 0($sp)
- sw $s0, 4($sp)
-
- lui $a3, IOBASE # Get GPU status (for interlace sync)
- lw $s0, GPU_GP1($a3)
-
-.Lhwait_loop: # Get Hblank time
- lw $v0, TIMER1_VALUE($a3)
- nop
- lw $v1, TIMER1_VALUE($a3)
- nop
- bne $v0, $v1, .Lhwait_loop
- nop
-
- la $a3, _vsync_lasthblank # Calculate Hblank time since last
- lw $v1, 0($a3)
- nop
- subu $v0, $v1
- andi $v0, 0xffff
-
- beq $a0, 1, .Lhblank_exit # Return Hblank time only, no VSync
- sw $v0, 8($sp) # Stored as return value
-
- bgez $a0, .Lvsync # Vsync if argument is 0 and up
- nop
-
- la $v0, _vsync_rcnt # Return VSync count only
- lw $v0, 0($v0)
- nop
- b .Lvsync_exit
- sw $v0, 8($sp)
-
-.Lvsync:
-
- bnez $a0, .Lnot_zero
- nop
- li $a0, 1
-
-.Lnot_zero:
-
- la $v0, _vsync_rcnt # Call vsync sub function (with timeout)
- lw $v0, 0($v0)
- addiu $a1, $a0, 1
- jal _vsync_sub
- addu $a0, $v0, $a0
-
- lui $v0, 0x40
- and $v0, $s0, $v0
- beqz $v0, .Lhblank_exit
- nop
-
- lui $a3, IOBASE # Interlace wait logic
-
- lw $v0, GPU_GP1($a3)
- nop
- xor $v0, $s0, $v0
- bltz $v0, .Lhblank_exit
- lui $a0, 0x8000
-
-.Linterlace_wait:
- lw $v0, GPU_GP1($a3)
- nop
- xor $v0, $s0, $v0
- and $v0, $a0
- beqz $v0, .Linterlace_wait
- nop
-
-.Lhblank_exit: # Set current Hblank as last value
-
- la $a2, _vsync_lasthblank
-
-.Lhwait2_loop:
- lw $v0, TIMER1_VALUE($a3)
- nop
- lw $v1, TIMER1_VALUE($a3)
- sw $v0, 0($a2)
- bne $v0, $v1, .Lhwait2_loop
- nop
-
-.Lvsync_exit:
-
- lw $ra, 0($sp)
- lw $s0, 4($sp)
- lw $v0, 8($sp)
- jr $ra
- addiu $sp, 12
-
-
-.type _vsync_sub, @function
-_vsync_sub:
-
- # a0 - VSync destination count
- # a1 - Timeout ratio (number of vsyncs to wait relative to vsync count)
-
- addiu $sp, -4
- sw $ra, 0($sp)
-
- sll $a1, 15 # Timeout counter
-
- la $v0, _vsync_rcnt
- lw $v0, 0($v0)
- nop
- bge $v0, $a0, .Lvsync_sub_exit
- nop
-
-.Lvsync_wait:
-
- addiu $a1, -1
-
- la $v1, 0xffffffff
- bne $a1, $v1, .Lnot_timeout
- nop
-
- la $a0, vsynctimeout_msg
- jal puts
- addiu $sp, -8
-
- jal ChangeClearPAD
- move $a0, $0
-
- li $a0, 3
- jal ChangeClearRCnt
- move $a1, $0
-
- addiu $sp, 8
- b .Lvsync_sub_exit
- li $v0, -1
-
-.Lnot_timeout:
-
- la $v0, _vsync_rcnt
- lw $v0, 0($v0)
- nop
- blt $v0, $a0, .Lvsync_wait
- nop
-
-.Lvsync_sub_exit:
-
- lw $ra, 0($sp)
- addiu $sp, 4
- jr $ra
- move $v0, $0
-
-
-
-.type _vsync_irq_callback, @function
-_vsync_irq_callback:
-
- lui $a0, IOBASE
-
- la $v1, _vsync_rcnt # Increment VSync root counter
- lw $v0, 0($v1)
- nop
- addiu $v0, 1
- sw $v0, 0($v1)
-
- la $v0, _vsync_cb_func # Check if a callback function is set
- lw $v0, 0($v0)
- nop
- beqz $v0, .Lno_callback
- nop
-
- addiu $sp, -4 # Save return address
- sw $ra, 0($sp)
- jalr $v0 # Execute user callback function
- nop
- lw $ra, 0($sp) # Restore previous return address
- addiu $sp, 4
-
- lui $a0, IOBASE
-
-.Lno_callback:
-
- jr $ra
- nop
-
-
-.section .data
-
-# VSync root counter
-.type _vsync_rcnt, @object
-_vsync_rcnt:
- .word 0
-
-.type _vsync_lasthblank, @object
-_vsync_lasthblank:
- .word 0
-
-.comm _vsync_cb_func, 4, 4
-
-.comm _gpu_standard, 4, 4
-.comm _gpu_current_field, 4, 4
-.comm _hooks_installed, 4, 4
-
-
-.type vsynctimeout_msg, @object
-vsynctimeout_msg:
- .asciiz "VSync: timeout\n"
-
-.type resetgraph_msg, @object
-resetgraph_msg:
- .asciiz "ResetGraph:itb=%08x,ehk=%08x\n"
-
-.type enableint_msg, @object
-enableint_msg:
- .asciiz "ResetGraph:Interrupts enabled!\n"
-
-.type cbhooks_msg, @object
-cbhooks_msg:
- .asciiz "ResetGraph:Interrupt hooks enabled.\n"
-
-.type abouttoen_msg, @object
-abouttoen_msg:
- .asciiz "ResetGraph:About to init interrupts.\n"
-
-.type sr_msg, @object
-sr_msg:
- .asciiz "ResetGraph:SR=%x\n"
-
-.global psxgpu_credits
-.type psxgpu_credits, @object
-psxgpu_credits:
- .ascii "psxgpu programs by Lameguy64\n"
- .asciiz "2020 PSn00bSDK Project / Meido-Tek Productions\n"
- \ No newline at end of file
generated by cgit v1.2.3 (git 2.39.1) at 2026-06-13 02:27:16 +0000