forked from Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
118 lines
2.5 KiB
118 lines
2.5 KiB
// SPDX-License-Identifier: GPL-2.0+ |
|
/* |
|
* Copyright (C) 2013-2014 Synopsys, Inc. All rights reserved. |
|
*/ |
|
|
|
#include <asm/cache.h> |
|
#include <common.h> |
|
|
|
DECLARE_GLOBAL_DATA_PTR; |
|
|
|
static ulong get_sp(void) |
|
{ |
|
ulong ret; |
|
|
|
asm("mov %0, sp" : "=r"(ret) : ); |
|
return ret; |
|
} |
|
|
|
void arch_lmb_reserve(struct lmb *lmb) |
|
{ |
|
ulong sp; |
|
|
|
/* |
|
* 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; |
|
lmb_reserve(lmb, sp, (CONFIG_SYS_SDRAM_BASE + gd->ram_size - sp)); |
|
} |
|
|
|
static int cleanup_before_linux(void) |
|
{ |
|
disable_interrupts(); |
|
sync_n_cleanup_cache_all(); |
|
|
|
return 0; |
|
} |
|
|
|
__weak int board_prep_linux(bootm_headers_t *images) { return 0; } |
|
|
|
/* Subcommand: PREP */ |
|
static int boot_prep_linux(bootm_headers_t *images) |
|
{ |
|
int ret; |
|
|
|
ret = image_setup_linux(images); |
|
if (ret) |
|
return ret; |
|
|
|
return board_prep_linux(images); |
|
} |
|
|
|
/* Generic implementation for single core CPU */ |
|
__weak void board_jump_and_run(ulong entry, int zero, int arch, uint params) |
|
{ |
|
void (*kernel_entry)(int zero, int arch, uint params); |
|
|
|
kernel_entry = (void (*)(int, int, uint))entry; |
|
|
|
kernel_entry(zero, arch, params); |
|
} |
|
|
|
/* Subcommand: GO */ |
|
static void boot_jump_linux(bootm_headers_t *images, int flag) |
|
{ |
|
ulong kernel_entry; |
|
unsigned int r0, r2; |
|
int fake = (flag & BOOTM_STATE_OS_FAKE_GO); |
|
|
|
kernel_entry = images->ep; |
|
|
|
debug("## Transferring control to Linux (at address %08lx)...\n", |
|
kernel_entry); |
|
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"); |
|
|
|
if (IMAGE_ENABLE_OF_LIBFDT && images->ft_len) { |
|
r0 = 2; |
|
r2 = (unsigned int)images->ft_addr; |
|
} else { |
|
r0 = 1; |
|
r2 = (unsigned int)env_get("bootargs"); |
|
} |
|
|
|
cleanup_before_linux(); |
|
|
|
if (!fake) |
|
board_jump_and_run(kernel_entry, r0, 0, r2); |
|
} |
|
|
|
int do_bootm_linux(int flag, int argc, char *argv[], bootm_headers_t *images) |
|
{ |
|
/* No need for those on ARC */ |
|
if ((flag & BOOTM_STATE_OS_BD_T) || (flag & BOOTM_STATE_OS_CMDLINE)) |
|
return -1; |
|
|
|
if (flag & BOOTM_STATE_OS_PREP) |
|
return boot_prep_linux(images); |
|
|
|
if (flag & (BOOTM_STATE_OS_GO | BOOTM_STATE_OS_FAKE_GO)) { |
|
boot_jump_linux(images, flag); |
|
return 0; |
|
} |
|
|
|
return -1; |
|
}
|
|
|