Revert "Add U-Boot loader over MMU"

This reverts commit 3e93562761.

x1/.gitignore

@@ -1 +0,0 @@
-c/uboot_bin.h

x1/Makefile

@@ -21,15 +21,6 @@ c/main.elf:
 c/main.bin: c/main.elf
 	@./extract.py c/main.elf $@
 
-c/uboot_loader.bin:
-	@if [ "$(UBOOT)" = "" ]; then \
-		echo "Please specify UBOOT."; \
-		exit 1; \
-	fi
-	@c/generate.py $(UBOOT) c/uboot_bin.h.tpl c/uboot_bin.h
-	@$(CC) -nostdlib -static -fPIC -marm -O0 c/start.S c/main_uboot.c -o c/uboot_loader.elf
-	@./extract.py c/uboot_loader.elf $@
-
 spray/main.bin:
 	@$(AS) spray/top.S
 	@./extract.py -p a.out spray/top.bin

x1/c/common.h

@@ -2,7 +2,6 @@
 
 #define readl(a) (*(volatile unsigned int *)(a))
 #define writel(v, a) (*(volatile unsigned int *)(a) = (v))
-#define writeb(v, a) (*(volatile unsigned char *)(a) = (v))
 
 typedef unsigned int u32;
 typedef unsigned short u16;

x1/c/generate.py

@@ -1,27 +0,0 @@
-#!/usr/bin/env python3
-import sys
-import textwrap
-
-
-def main():
-    if len(sys.argv) < 3:
-        print(f'Usage: {sys.argv[0]} u-boot.bin uboot_bin.h.tpl uboot_bin.h')
-
-    with open(sys.argv[2]) as f:
-        tpl = f.read()
-
-    with open(sys.argv[1], 'rb') as ui, open(sys.argv[3], 'w') as header:
-        uboot = ui.read()
-
-        out = ''
-        for i, b in enumerate(uboot):
-            out += f'{b:#04x}, '
-            if (i+1) % 16 == 0:
-                out = out.rstrip()
-                out += '\n'
-
-        formatted = tpl.format(uboot_size=len(uboot), uboot_bin=textwrap.indent(out, '    '))
-        header.write(formatted)
-
-
-main()

x1/c/main_uboot.c

@@ -1,34 +0,0 @@
-#include "common.h"
-#include "uboot_bin.h"
-
-#define VIRT_START (unsigned char *)0x8c000000
-
-void main() {
-    int i;
-    u8* ptr = VIRT_START;
-
-    // Turn off interrupts
-    asm volatile (
-        "cpsid if \n"
-    );
-
-    for (i=0; i<UBOOT_SIZE; i++) {
-        writeb(uboot_bin[i], ptr);
-        ptr++;
-    }
-
-    asm volatile (
-        "mrc p15, 0, r8, c14, c2, 1 \n"
-        "bic r8, r8, #1 \n"
-        "mcr p15, 0, r8, c14, c2, 1 \n"
-        "mrc p15, 0, r8, c14, c3, 1 \n"
-        "bic r8, r8, #1 \n"
-        "mcr p15, 0, r8, c14, c3, 1 \n"
-
-        "mrc p15, 0, r10, c1, c0, 0 \n"
-        "bic r10, r10, #1 \n"
-        "mcr p15, 0, r10, c1, c0, 0 \n"
-        "ldr r0, =0x60200000 \n"
-        "mov pc, r0"
-    );
-}

x1/c/uboot_bin.h.tpl

@@ -1,5 +0,0 @@
-#define UBOOT_SIZE {uboot_size}
-
-unsigned char uboot_bin[] = {{
-{uboot_bin}
-}};