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author | vetch <vetch97@gmail.com> | 2020-01-13 12:40:38 +0100 |
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committer | vetch <vetch97@gmail.com> | 2020-01-13 12:40:38 +0100 |
commit | 1af7591e37d09ddcd734ea07d0e999cf61c8bc5e (patch) | |
tree | a56c73c9eddeb148baffc3a31bf50edbbeb31074 /src/arm/PL1/loader/loader_stage2.c | |
parent | 300cf770698142b636da867b7e04bf2d6ae9baa4 (diff) | |
download | rpi-MMU-example-1af7591e37d09ddcd734ea07d0e999cf61c8bc5e.tar.gz rpi-MMU-example-1af7591e37d09ddcd734ea07d0e999cf61c8bc5e.zip |
Great Reorganisation, modify structure and makefile
Diffstat (limited to 'src/arm/PL1/loader/loader_stage2.c')
-rw-r--r-- | src/arm/PL1/loader/loader_stage2.c | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/src/arm/PL1/loader/loader_stage2.c b/src/arm/PL1/loader/loader_stage2.c new file mode 100644 index 0000000..fc3ae1c --- /dev/null +++ b/src/arm/PL1/loader/loader_stage2.c @@ -0,0 +1,33 @@ +#include <stddef.h> +#include <stdint.h> +#include "uart.h" +#include "io.h" +#include "global.h" + +void *const kernel_load_addr = ((void*) 0x8000); + +void _stage2_main(uint32_t r0, uint32_t r1, uint32_t atags) +{ + uart_init(); + + // get kernel size via uart (little endian) + uint32_t b0, b1, b2, b3; + + b0 = getchar(); + b1 = getchar(); + b2 = getchar(); + b3 = getchar(); + + uint32_t kernel_size = b0 | (b1 << 8) | (b2 << 16) | (b3 << 24); + + // load kernel at kernel_load_addr + char *dst = kernel_load_addr, *end = dst + kernel_size; + + while (dst < end) + *(dst++) = getchar(); + + // jump to kernel + ((void(*)(uint32_t, uint32_t, uint32_t)) kernel_load_addr) + (r0, r1, atags); +} + |