1*83d290c5STom Rini // SPDX-License-Identifier: GPL-2.0+ 2ea0364f1SPeter Tyser /* 3ea0364f1SPeter Tyser * (C) Copyright 2003 4ea0364f1SPeter Tyser * Wolfgang Denk, DENX Software Engineering, wd@denx.de. 5ea0364f1SPeter Tyser */ 6ea0364f1SPeter Tyser 7ea0364f1SPeter Tyser #include <common.h> 8ea0364f1SPeter Tyser #include <command.h> 9ea0364f1SPeter Tyser #include <image.h> 10ea0364f1SPeter Tyser #include <u-boot/zlib.h> 11ea0364f1SPeter Tyser #include <bzlib.h> 12ea0364f1SPeter Tyser #include <watchdog.h> 13ea0364f1SPeter Tyser #include <environment.h> 14ea0364f1SPeter Tyser #include <asm/byteorder.h> 15ea0364f1SPeter Tyser #ifdef CONFIG_SHOW_BOOT_PROGRESS 16ea0364f1SPeter Tyser # include <status_led.h> 17ea0364f1SPeter Tyser #endif 18ea0364f1SPeter Tyser 19ea0364f1SPeter Tyser DECLARE_GLOBAL_DATA_PTR; 20ea0364f1SPeter Tyser 21ea0364f1SPeter Tyser #define PHYSADDR(x) x 22ea0364f1SPeter Tyser 23ea0364f1SPeter Tyser #define LINUX_MAX_ENVS 256 24ea0364f1SPeter Tyser #define LINUX_MAX_ARGS 256 25ea0364f1SPeter Tyser 26ea0364f1SPeter Tyser static ulong get_sp (void); 27ea0364f1SPeter Tyser static void set_clocks_in_mhz (bd_t *kbd); 28ea0364f1SPeter Tyser 29ea0364f1SPeter Tyser void arch_lmb_reserve(struct lmb *lmb) 30ea0364f1SPeter Tyser { 31ea0364f1SPeter Tyser ulong sp; 32ea0364f1SPeter Tyser 33ea0364f1SPeter Tyser /* 34ea0364f1SPeter Tyser * Booting a (Linux) kernel image 35ea0364f1SPeter Tyser * 36ea0364f1SPeter Tyser * Allocate space for command line and board info - the 37ea0364f1SPeter Tyser * address should be as high as possible within the reach of 38ea0364f1SPeter Tyser * the kernel (see CONFIG_SYS_BOOTMAPSZ settings), but in unused 39ea0364f1SPeter Tyser * memory, which means far enough below the current stack 40ea0364f1SPeter Tyser * pointer. 41ea0364f1SPeter Tyser */ 42ea0364f1SPeter Tyser sp = get_sp(); 43ea0364f1SPeter Tyser debug ("## Current stack ends at 0x%08lx ", sp); 44ea0364f1SPeter Tyser 45ea0364f1SPeter Tyser /* adjust sp by 1K to be safe */ 46ea0364f1SPeter Tyser sp -= 1024; 47ea0364f1SPeter Tyser lmb_reserve(lmb, sp, (CONFIG_SYS_SDRAM_BASE + gd->ram_size - sp)); 48ea0364f1SPeter Tyser } 49ea0364f1SPeter Tyser 5054841ab5SWolfgang Denk int do_bootm_linux(int flag, int argc, char * const argv[], bootm_headers_t *images) 51ea0364f1SPeter Tyser { 52ea0364f1SPeter Tyser int ret; 53ea0364f1SPeter Tyser bd_t *kbd; 54ea0364f1SPeter Tyser void (*kernel) (bd_t *, ulong, ulong, ulong, ulong); 55ea0364f1SPeter Tyser struct lmb *lmb = &images->lmb; 56ea0364f1SPeter Tyser 572cb0e55aSAndreas Bießmann /* 582cb0e55aSAndreas Bießmann * allow the PREP bootm subcommand, it is required for bootm to work 592cb0e55aSAndreas Bießmann */ 602cb0e55aSAndreas Bießmann if (flag & BOOTM_STATE_OS_PREP) 612cb0e55aSAndreas Bießmann return 0; 622cb0e55aSAndreas Bießmann 63ea0364f1SPeter Tyser if ((flag != 0) && (flag != BOOTM_STATE_OS_GO)) 64ea0364f1SPeter Tyser return 1; 65ea0364f1SPeter Tyser 66ea0364f1SPeter Tyser /* allocate space for kernel copy of board info */ 67590d3cacSGrant Likely ret = boot_get_kbd (lmb, &kbd); 68ea0364f1SPeter Tyser if (ret) { 69ea0364f1SPeter Tyser puts("ERROR with allocation of kernel bd\n"); 70ea0364f1SPeter Tyser goto error; 71ea0364f1SPeter Tyser } 72ea0364f1SPeter Tyser set_clocks_in_mhz(kbd); 73ea0364f1SPeter Tyser 7424507cf5SSimon Glass ret = image_setup_linux(images); 75ea0364f1SPeter Tyser if (ret) 76ea0364f1SPeter Tyser goto error; 77ea0364f1SPeter Tyser 7824507cf5SSimon Glass kernel = (void (*)(bd_t *, ulong, ulong, ulong, ulong))images->ep; 7924507cf5SSimon Glass 80ea0364f1SPeter Tyser debug("## Transferring control to Linux (at address %08lx) ...\n", 81ea0364f1SPeter Tyser (ulong) kernel); 82ea0364f1SPeter Tyser 83770605e4SSimon Glass bootstage_mark(BOOTSTAGE_ID_RUN_OS); 84ea0364f1SPeter Tyser 85ea0364f1SPeter Tyser /* 86ea0364f1SPeter Tyser * Linux Kernel Parameters (passing board info data): 87ea0364f1SPeter Tyser * sp+00: Ignore, side effect of using jsr to jump to kernel 88ea0364f1SPeter Tyser * sp+04: ptr to board info data 89ea0364f1SPeter Tyser * sp+08: initrd_start or 0 if no initrd 90ea0364f1SPeter Tyser * sp+12: initrd_end - unused if initrd_start is 0 91ea0364f1SPeter Tyser * sp+16: Start of command line string 92ea0364f1SPeter Tyser * sp+20: End of command line string 93ea0364f1SPeter Tyser */ 94ddc94378SSimon Glass (*kernel)(kbd, images->initrd_start, images->initrd_end, 95ddc94378SSimon Glass images->cmdline_start, images->cmdline_end); 96ea0364f1SPeter Tyser /* does not return */ 97ea0364f1SPeter Tyser error: 98ea0364f1SPeter Tyser return 1; 99ea0364f1SPeter Tyser } 100ea0364f1SPeter Tyser 101ea0364f1SPeter Tyser static ulong get_sp (void) 102ea0364f1SPeter Tyser { 103ea0364f1SPeter Tyser ulong sp; 104ea0364f1SPeter Tyser 105ea0364f1SPeter Tyser asm("movel %%a7, %%d0\n" 106ea0364f1SPeter Tyser "movel %%d0, %0\n": "=d"(sp): :"%d0"); 107ea0364f1SPeter Tyser 108ea0364f1SPeter Tyser return sp; 109ea0364f1SPeter Tyser } 110ea0364f1SPeter Tyser 111ea0364f1SPeter Tyser static void set_clocks_in_mhz (bd_t *kbd) 112ea0364f1SPeter Tyser { 113ea0364f1SPeter Tyser char *s; 114ea0364f1SPeter Tyser 11500caae6dSSimon Glass s = env_get("clocks_in_mhz"); 11600caae6dSSimon Glass if (s) { 117ea0364f1SPeter Tyser /* convert all clock information to MHz */ 118ea0364f1SPeter Tyser kbd->bi_intfreq /= 1000000L; 119ea0364f1SPeter Tyser kbd->bi_busfreq /= 1000000L; 120ea0364f1SPeter Tyser } 121ea0364f1SPeter Tyser } 122