ARMv7-A Bare Bones: Difference between revisions
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| [unchecked revision] | [unchecked revision] |
Content added Content deleted
m (Added this article to the ARM page category) |
(Amending code errors) |
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| Line 37: | Line 37: | ||
.global _start |
.global _start |
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_start: |
_start: |
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ldr sp, =STACK_TOP |
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bl start |
bl start |
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1: |
1: |
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| Line 47: | Line 47: | ||
<syntaxhighlight lang="c"> |
<syntaxhighlight lang="c"> |
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#include <stdint.h> |
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#define UART0_BASE 0x1c090000 |
#define UART0_BASE 0x1c090000 |
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void start() |
void start() |
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| Line 63: | Line 65: | ||
* memory map provided in the CoreTile TRM (see below). |
* memory map provided in the CoreTile TRM (see below). |
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*/ |
*/ |
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. = 0x80010000 |
. = 0x80010000; |
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/* Make sure our entry stub goes first */ |
/* Make sure our entry stub goes first */ |
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| Line 72: | Line 74: | ||
.bss : { *(.bss COMMON) } |
.bss : { *(.bss COMMON) } |
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STACK_BASE = . |
STACK_BASE = .; |
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. += 0x10000 |
. += 0x10000; |
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STACK_TOP = . |
STACK_TOP = .; |
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} |
} |
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</pre> |
</pre> |
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| Line 84: | Line 86: | ||
$ arm-none-eabi-gcc -ffreestanding -Wall -Wextra -Werror -c start.c -o start.o |
$ arm-none-eabi-gcc -ffreestanding -Wall -Wextra -Werror -c start.c -o start.o |
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$ arm-none-eabi-ld -T linker.ld _start.o start.o -o kernel.elf |
$ arm-none-eabi-ld -T linker.ld _start.o start.o -o kernel.elf |
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$ qemu-system-arm -M vexpress-a15 -cpu cortex-a15 -kernel kernel. |
$ qemu-system-arm -M vexpress-a15 -cpu cortex-a15 -kernel kernel.elf -nographic |
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</pre> |
</pre> |
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