From ce90c0aa44b1f07ddd59159ae60e6f63357d85b8 Mon Sep 17 00:00:00 2001
From: Christian Cunningham <cc@localhost>
Date: Tue, 21 Dec 2021 21:55:56 -0800
Subject: Fixed Graphics

---
 src/graphics/core.S | 124 ----------------------------------------------------
 1 file changed, 124 deletions(-)
 delete mode 100644 src/graphics/core.S

(limited to 'src/graphics/core.S')

diff --git a/src/graphics/core.S b/src/graphics/core.S
deleted file mode 100644
index 3e3b038..0000000
--- a/src/graphics/core.S
+++ /dev/null
@@ -1,124 +0,0 @@
-.section .text
-.globl init_graphics
-init_graphics:
-	push {lr}
-	@ set Video Controller resolution to 640x480x16bit
-	@ 16-bit, cause the 8-bit depth needs a palette
-	ldr r1, =vc_set_res
-	bl  mb0_c8_write
-	bl  mb0_c8_read
-	tst r0, #0x80000000
-	beq .vc_init_fail
-
-	@ get VC framebuffer address
-	ldr r1, =vc_alloc_fb
-	bl  mb0_c8_write
-	bl  mb0_c8_read
-	tst r0, #0x80000008
-	beq .vc_init_fail
-
-	@ check if the address is correct
-	ldr r0, [r1, #20]
-	cmp r0, #0
-	beq .vc_init_fail
-
-	@ draw "NO OS" text
-	@bl vc_draw_no_os_bmp
-	ldr r1, =vram_base
-	str r0, [r1]
-	pop {pc}
-
-.vc_init_fail:
-	ldr r1, =txt_vc_fail
-	bl uart_string
-	pop {pc}
-
-.globl draw_pix
-draw_pix:
-	push {r0, r1, r2, r3, r4, lr}
-	ldr r4, =vram_base
-	ldr r4, [r4]
-	mov r3, #2
-	mul r0, r3
-	add r4, r0
-	push {r2}
-	mov r2, #640
-	mul r2, r3
-	mul r3, r1, r2
-	add r4, r3
-	pop {r1}
-	str r1, [r4]
-	pop {r0, r1, r2, r3, r4, pc}
-
-@@@@@@@@@@@@@@@ VC @@@@@@@@@@@@@@
-
-.equ MBOX0, 0x3f00b880
-
-@ writes to mailbox #0, channel 8
-@ r1 - message
-mb0_c8_write:
-	message .req r1
-	mailbox .req r3
-	status  .req r2
-
-	ldr mailbox, =MBOX0
-.mb0_full:
-	ldr status, [mailbox, #0x18]
-	tst status, #0x80000000  @ mailbox full flag
-	bne .mb0_full 
-	add message, #8          @ channel 8
-	str message, [mailbox, #0x20] @ write addr
-	sub message, #8
-
-	.unreq mailbox
-	.unreq message
-	.unreq status
-	mov pc, lr
-
-@ reads from mailbox #0, channel 8
-@ r1 - message
-@ returns status in r0
-mb0_c8_read:
-	message .req r1
-	mailbox .req r2
-	status  .req r3
-	value   .req r4
-
-	ldr mailbox, =MBOX0
-.mb0_empty:
-	ldr status, [mailbox, #0x18] 
-	tst status, #0x40000000  @ mailbox empty flag
-	bne .mb0_empty
-
-	ldr value, [mailbox] @ check if the message channel is 8
-	and r0, value, #0xf
-	teq r0, #8
-	bne .mb0_empty
-
-	ldr r0, [message, #4] 
-	.unreq message
-	.unreq mailbox
-	.unreq status
-	.unreq value
-	mov pc, lr
-
-@ raspi mailbox requests, must be padded to 16 bytes
-.align 4
-vc_set_res:  .word 80, 0                      @ total size, code (0=req)
-	.word 0x00048003, 8, 8, 640, 480 @ set physical size (640x480)
-	.word 0x00048004, 8, 8, 640, 480 @ set virtual size (640x480)
-	.word 0x00048005, 4, 4, 16       @ set depth (16-bit)
-	.word 0, 0, 0, 0                 @ end tag & padding
-
-vc_alloc_fb: .word 32, 0                      @ total size, code (0=req)
-	.word 0x00040001, 8, 4, 16, 0    @ allocate framebuffer
-	.word 0                          @ end tag & padding
-
-.align 2
-txt_welcome: .asciz "No OS installed\r\n"
-txt_vc_fail: .asciz "VC initialization failed\r\n"
-
-.align 2
-.globl vram_base
-vram_base: .word 0,0
-vmem: .word 0xFFFF
-- 
cgit v1.2.1