2 * Copyright (C) 2013-2014 Synopsys, Inc. All rights reserved.
4 * SPDX-License-Identifier: GPL-2.0+
9 DECLARE_GLOBAL_DATA_PTR;
11 static ulong get_sp(void)
15 asm("mov %0, sp" : "=r"(ret) : );
19 void arch_lmb_reserve(struct lmb *lmb)
24 * Booting a (Linux) kernel image
26 * Allocate space for command line and board info - the
27 * address should be as high as possible within the reach of
28 * the kernel (see CONFIG_SYS_BOOTMAPSZ settings), but in unused
29 * memory, which means far enough below the current stack
33 debug("## Current stack ends at 0x%08lx ", sp);
35 /* adjust sp by 4K to be safe */
37 lmb_reserve(lmb, sp, (CONFIG_SYS_SDRAM_BASE + gd->ram_size - sp));
40 static int cleanup_before_linux(void)
44 invalidate_icache_all();
49 /* Subcommand: PREP */
50 static void boot_prep_linux(bootm_headers_t *images)
52 if (image_setup_linux(images))
56 __weak void smp_set_core_boot_addr(unsigned long addr, int corenr) {}
57 __weak void smp_kick_all_cpus(void) {}
60 static void boot_jump_linux(bootm_headers_t *images, int flag)
62 void (*kernel_entry)(int zero, int arch, uint params);
64 int fake = (flag & BOOTM_STATE_OS_FAKE_GO);
66 kernel_entry = (void (*)(int, int, uint))images->ep;
68 debug("## Transferring control to Linux (at address %08lx)...\n",
69 (ulong) kernel_entry);
70 bootstage_mark(BOOTSTAGE_ID_RUN_OS);
72 printf("\nStarting kernel ...%s\n\n", fake ?
73 "(fake run for tracing)" : "");
74 bootstage_mark_name(BOOTSTAGE_ID_BOOTM_HANDOFF, "start_kernel");
76 cleanup_before_linux();
78 if (IMAGE_ENABLE_OF_LIBFDT && images->ft_len) {
80 r2 = (unsigned int)images->ft_addr;
83 r2 = (unsigned int)getenv("bootargs");
86 smp_set_core_boot_addr((unsigned long)kernel_entry, -1);
90 kernel_entry(r0, 0, r2);
93 int do_bootm_linux(int flag, int argc, char *argv[], bootm_headers_t *images)
95 /* No need for those on ARC */
96 if ((flag & BOOTM_STATE_OS_BD_T) || (flag & BOOTM_STATE_OS_CMDLINE))
99 if (flag & BOOTM_STATE_OS_PREP) {
100 boot_prep_linux(images);
104 if (flag & (BOOTM_STATE_OS_GO | BOOTM_STATE_OS_FAKE_GO)) {
105 boot_jump_linux(images, flag);
109 boot_prep_linux(images);
110 boot_jump_linux(images, flag);