From 1af7591e37d09ddcd734ea07d0e999cf61c8bc5e Mon Sep 17 00:00:00 2001 From: vetch Date: Mon, 13 Jan 2020 12:40:38 +0100 Subject: Great Reorganisation, modify structure and makefile --- src/arm/PL1/loader/loader_stage2.c | 33 +++++++++++++++++++++++++++++++++ 1 file changed, 33 insertions(+) create mode 100644 src/arm/PL1/loader/loader_stage2.c (limited to 'src/arm/PL1/loader/loader_stage2.c') 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 +#include +#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); +} + -- cgit v1.2.3