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/*
* Copyright (c) 2012 Linaro Limited
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name of Linaro Limited nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*/
/* This file just contains a small glue function which fishes the
* location of kernel etc out of linker script defined symbols, and
* calls semi_loader functions to do the actual work of loading
* and booting the kernel.
*/
#include <stdint.h>
#include "semihosting.h"
#include "semi_loader.h"
/* Linker script defined symbols for any preloaded kernel/initrd */
extern uint8_t fs_start, fs_end, kernel_entry, kernel_start, kernel_end;
/* Symbols defined by boot.S */
extern uint8_t kernel_cmd, kernel_cmd_end;
static struct loader_info loader;
#ifdef MACH_MPS
#define PLAT_ID 10000 /* MPS (temporary) */
#elif defined (VEXPRESS)
#define PLAT_ID 2272 /* Versatile Express */
#else
#define PLAT_ID 827 /* RealView/EB */
#endif
void c_start(void)
{
/* Main C entry point */
loader.kernel_size = (uint32_t)&kernel_end - (uint32_t)&kernel_start;
loader.initrd_start = (uint32_t)&fs_start;
loader.initrd_size = (uint32_t)&fs_end - (uint32_t)&fs_start;
loader.kernel_entry = (uint32_t)&kernel_entry;
if (loader.kernel_size) {
loader.cmdline_start = (uint32_t)&kernel_cmd;
loader.cmdline_size = &kernel_cmd_end - &kernel_cmd;
}
load_kernel(&loader);
/* Start the kernel */
if(loader.fdt_start) {
boot_kernel(&loader, 0, -1, loader.fdt_start, 0);
} else {
boot_kernel(&loader, 0, PLAT_ID, loader.atags_start, 0);
}
semi_write0("[bootwrapper] ERROR: returned from boot_kernel\n");
}
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