From 215465df74a6065f4b0fdf199b8b04454520a398 Mon Sep 17 00:00:00 2001
From: Bad Diode <bd@badd10de.dev>
Date: Wed, 2 Jun 2021 20:20:23 +0200
Subject: Update the renderer to support a text layer

---
 src/interrupts.s | 89 --------------------------------------------------------
 1 file changed, 89 deletions(-)
 delete mode 100644 src/interrupts.s

(limited to 'src/interrupts.s')

diff --git a/src/interrupts.s b/src/interrupts.s
deleted file mode 100644
index 67b9fe9..0000000
--- a/src/interrupts.s
+++ /dev/null
@@ -1,89 +0,0 @@
-    .file "interrupts.s"
-    .extern irs_table;
-    .section .iwram, "ax", %progbits
-    .arm
-    .align
-    .global irs_main
-
-irs_main:
-    @ Get the contents of IRQ_ENABLE, IRQ_ACK, and IRQ_CTRL
-    ldr ip, mem_irq_base_reg        @ ip = (IRQ_ENABLE << 16) | IRQ_ACK
-    ldr r0, [ip]                    @ r0 = irq_enable
-    and r1, r0, r0, lsr #16         @ r1 = irq_enable & irq_ack
-
-    @ Disable IRQ_CTRL for now.
-    mov r3, #0                      @ r3 = 0
-    strh r3, [ip, #8]               @ *(ip + 0x8) = r3
-
-    @ r0 = irs_table address pointer
-    @ r2 = tmp
-    @ r3 = 0    (for r3; r3 < 14; r3++)
-    ldr r0, = irs_table
-irs_main_fp_search:
-    @ Check that the current index is an active IRQ.
-    mov r2, #1
-    and r2, r1, r2, lsl r3
-    cmp r2, #0
-    beq irs_main_fp_search_not_enabled
-
-    @ Extract the function pointer for this IRS if available.
-    ldr r2, [r0]
-    cmp r2, #0
-    bne irs_main_handle_irs
-
-irs_main_fp_search_not_enabled:
-    add r0, r0, #4
-    add r3, #1
-    cmp r3, #14
-    bne irs_main_fp_search
-    b irs_main_exit
-
-irs_main_handle_irs:
-    @ r2: Contains IRQ function pointer.
-    @ r3: Stores the IRQ index.
-
-    @ Acknowledge that we are handling this interrupt writing to IRQ_ACK and
-    @ IRQ_ACK_BIOS.
-    mov r0, #1
-    lsl r0, r0, r3
-    strh r0, [ip, #2]
-    ldr r1, mem_irq_ack_bios @ r1 = IRQ_ACK_BIOS
-    str r0, [r1]
-
-    @ Store the SPSR in one of the free registers and save it along with the
-    @ return pointer.
-    mrs r3, spsr
-    stmfd   sp!, {r3, lr}
-
-    @ Set CPU to system mode
-    mrs     r3, cpsr
-    bic     r3, r3, #0xDF
-    orr     r3, r3, #0x1F
-    msr     cpsr, r3
-
-    @ Call isr function pointer
-    stmfd   sp!, {lr}
-    mov     lr, pc
-    bx      r2
-    ldmfd   sp!, {lr}
-
-    @ Set CPU to irq mode
-    mrs     r3, cpsr
-    bic     r3, r3, #0xDF
-    orr     r3, r3, #0x92
-    msr     cpsr, r3
-
-    @ Restore the SPSR and the registers.
-    ldmfd   sp!, {r3, lr}
-    msr     spsr, r3
-
-irs_main_exit:
-    @ Restore IRQ_CTRL.
-    mov r3, #1                      @ r3 = 0
-    strh r3, [ip, #8]               @ *(ip + 0x8) = r3
-    bx lr
-
-mem_irq_base_reg:
-    .word 0x04000200 @ IRQ_ENABLE
-mem_irq_ack_bios:
-    .word 0x03007FF8 @ IRQ_ACK_BIOS
-- 
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