131 lines
3.1 KiB
C
131 lines
3.1 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* (C) Copyright 2007 Michal Simek
|
|
* (C) Copyright 2004 Atmark Techno, Inc.
|
|
*
|
|
* Michal SIMEK <monstr@monstr.eu>
|
|
* Yasushi SHOJI <yashi@atmark-techno.com>
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <command.h>
|
|
#include <cpu_func.h>
|
|
#include <env.h>
|
|
#include <fdt_support.h>
|
|
#include <hang.h>
|
|
#include <image.h>
|
|
#include <u-boot/zlib.h>
|
|
#include <asm/byteorder.h>
|
|
|
|
DECLARE_GLOBAL_DATA_PTR;
|
|
|
|
static ulong get_sp(void)
|
|
{
|
|
ulong ret;
|
|
|
|
asm("addik %0, r1, 0" : "=r"(ret) : );
|
|
return ret;
|
|
}
|
|
|
|
void arch_lmb_reserve(struct lmb *lmb)
|
|
{
|
|
ulong sp, bank_end;
|
|
int bank;
|
|
|
|
/*
|
|
* Booting a (Linux) kernel image
|
|
*
|
|
* Allocate space for command line and board info - the
|
|
* address should be as high as possible within the reach of
|
|
* the kernel (see CONFIG_SYS_BOOTMAPSZ settings), but in unused
|
|
* memory, which means far enough below the current stack
|
|
* pointer.
|
|
*/
|
|
sp = get_sp();
|
|
debug("## Current stack ends at 0x%08lx ", sp);
|
|
|
|
/* adjust sp by 4K to be safe */
|
|
sp -= 4096;
|
|
for (bank = 0; bank < CONFIG_NR_DRAM_BANKS; bank++) {
|
|
if (sp < gd->bd->bi_dram[bank].start)
|
|
continue;
|
|
bank_end = gd->bd->bi_dram[bank].start +
|
|
gd->bd->bi_dram[bank].size;
|
|
if (sp >= bank_end)
|
|
continue;
|
|
lmb_reserve(lmb, sp, bank_end - sp);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void boot_jump_linux(bootm_headers_t *images, int flag)
|
|
{
|
|
void (*thekernel)(char *cmdline, ulong rd, ulong dt);
|
|
ulong dt = (ulong)images->ft_addr;
|
|
ulong rd_start = images->initrd_start;
|
|
ulong cmdline = images->cmdline_start;
|
|
int fake = (flag & BOOTM_STATE_OS_FAKE_GO);
|
|
|
|
thekernel = (void (*)(char *, ulong, ulong))images->ep;
|
|
|
|
debug("## Transferring control to Linux (at address 0x%08lx) ",
|
|
(ulong)thekernel);
|
|
debug("cmdline 0x%08lx, ramdisk 0x%08lx, FDT 0x%08lx...\n",
|
|
cmdline, rd_start, dt);
|
|
bootstage_mark(BOOTSTAGE_ID_RUN_OS);
|
|
|
|
printf("\nStarting kernel ...%s\n\n", fake ?
|
|
"(fake run for tracing)" : "");
|
|
bootstage_mark_name(BOOTSTAGE_ID_BOOTM_HANDOFF, "start_kernel");
|
|
|
|
#ifdef XILINX_USE_DCACHE
|
|
flush_cache(0, XILINX_DCACHE_BYTE_SIZE);
|
|
#endif
|
|
|
|
if (!fake) {
|
|
/*
|
|
* Linux Kernel Parameters (passing device tree):
|
|
* r5: pointer to command line
|
|
* r6: pointer to ramdisk
|
|
* r7: pointer to the fdt, followed by the board info data
|
|
*/
|
|
thekernel((char *)cmdline, rd_start, dt);
|
|
/* does not return */
|
|
}
|
|
}
|
|
|
|
static void boot_prep_linux(bootm_headers_t *images)
|
|
{
|
|
if (IMAGE_ENABLE_OF_LIBFDT && images->ft_len) {
|
|
debug("using: FDT\n");
|
|
if (image_setup_linux(images)) {
|
|
printf("FDT creation failed! hanging...");
|
|
hang();
|
|
}
|
|
}
|
|
}
|
|
|
|
int do_bootm_linux(int flag, int argc, char * const argv[],
|
|
bootm_headers_t *images)
|
|
{
|
|
images->cmdline_start = (ulong)env_get("bootargs");
|
|
|
|
/* cmdline init is the part of 'prep' and nothing to do for 'bdt' */
|
|
if (flag & BOOTM_STATE_OS_BD_T || flag & BOOTM_STATE_OS_CMDLINE)
|
|
return -1;
|
|
|
|
if (flag & BOOTM_STATE_OS_PREP) {
|
|
boot_prep_linux(images);
|
|
return 0;
|
|
}
|
|
|
|
if (flag & (BOOTM_STATE_OS_GO | BOOTM_STATE_OS_FAKE_GO)) {
|
|
boot_jump_linux(images, flag);
|
|
return 0;
|
|
}
|
|
|
|
boot_prep_linux(images);
|
|
boot_jump_linux(images, flag);
|
|
return 1;
|
|
}
|