1ea0364f1SPeter Tyser /* 2ea0364f1SPeter Tyser * (C) Copyright 2003 3ea0364f1SPeter Tyser * Wolfgang Denk, DENX Software Engineering, wd@denx.de. 4ea0364f1SPeter Tyser * 51a459660SWolfgang Denk * SPDX-License-Identifier: GPL-2.0+ 6ea0364f1SPeter Tyser */ 7ea0364f1SPeter Tyser 8ea0364f1SPeter Tyser #include <common.h> 9ea0364f1SPeter Tyser #include <command.h> 10ea0364f1SPeter Tyser #include <image.h> 11ea0364f1SPeter Tyser #include <u-boot/zlib.h> 12ea0364f1SPeter Tyser #include <bzlib.h> 13ea0364f1SPeter Tyser #include <watchdog.h> 14ea0364f1SPeter Tyser #include <environment.h> 15ea0364f1SPeter Tyser #include <asm/byteorder.h> 16ea0364f1SPeter Tyser #ifdef CONFIG_SHOW_BOOT_PROGRESS 17ea0364f1SPeter Tyser # include <status_led.h> 18ea0364f1SPeter Tyser #endif 19ea0364f1SPeter Tyser 20ea0364f1SPeter Tyser DECLARE_GLOBAL_DATA_PTR; 21ea0364f1SPeter Tyser 22ea0364f1SPeter Tyser #define PHYSADDR(x) x 23ea0364f1SPeter Tyser 24ea0364f1SPeter Tyser #define LINUX_MAX_ENVS 256 25ea0364f1SPeter Tyser #define LINUX_MAX_ARGS 256 26ea0364f1SPeter Tyser 27ea0364f1SPeter Tyser static ulong get_sp (void); 28ea0364f1SPeter Tyser static void set_clocks_in_mhz (bd_t *kbd); 29ea0364f1SPeter Tyser 30ea0364f1SPeter Tyser void arch_lmb_reserve(struct lmb *lmb) 31ea0364f1SPeter Tyser { 32ea0364f1SPeter Tyser ulong sp; 33ea0364f1SPeter Tyser 34ea0364f1SPeter Tyser /* 35ea0364f1SPeter Tyser * Booting a (Linux) kernel image 36ea0364f1SPeter Tyser * 37ea0364f1SPeter Tyser * Allocate space for command line and board info - the 38ea0364f1SPeter Tyser * address should be as high as possible within the reach of 39ea0364f1SPeter Tyser * the kernel (see CONFIG_SYS_BOOTMAPSZ settings), but in unused 40ea0364f1SPeter Tyser * memory, which means far enough below the current stack 41ea0364f1SPeter Tyser * pointer. 42ea0364f1SPeter Tyser */ 43ea0364f1SPeter Tyser sp = get_sp(); 44ea0364f1SPeter Tyser debug ("## Current stack ends at 0x%08lx ", sp); 45ea0364f1SPeter Tyser 46ea0364f1SPeter Tyser /* adjust sp by 1K to be safe */ 47ea0364f1SPeter Tyser sp -= 1024; 48ea0364f1SPeter Tyser lmb_reserve(lmb, sp, (CONFIG_SYS_SDRAM_BASE + gd->ram_size - sp)); 49ea0364f1SPeter Tyser } 50ea0364f1SPeter Tyser 5154841ab5SWolfgang Denk int do_bootm_linux(int flag, int argc, char * const argv[], bootm_headers_t *images) 52ea0364f1SPeter Tyser { 53ea0364f1SPeter Tyser int ret; 54ea0364f1SPeter Tyser bd_t *kbd; 55ea0364f1SPeter Tyser void (*kernel) (bd_t *, ulong, ulong, ulong, ulong); 56ea0364f1SPeter Tyser struct lmb *lmb = &images->lmb; 57ea0364f1SPeter Tyser 582cb0e55aSAndreas Bießmann /* 592cb0e55aSAndreas Bießmann * allow the PREP bootm subcommand, it is required for bootm to work 602cb0e55aSAndreas Bießmann */ 612cb0e55aSAndreas Bießmann if (flag & BOOTM_STATE_OS_PREP) 622cb0e55aSAndreas Bießmann return 0; 632cb0e55aSAndreas Bießmann 64ea0364f1SPeter Tyser if ((flag != 0) && (flag != BOOTM_STATE_OS_GO)) 65ea0364f1SPeter Tyser return 1; 66ea0364f1SPeter Tyser 67ea0364f1SPeter Tyser /* allocate space for kernel copy of board info */ 68590d3cacSGrant Likely ret = boot_get_kbd (lmb, &kbd); 69ea0364f1SPeter Tyser if (ret) { 70ea0364f1SPeter Tyser puts("ERROR with allocation of kernel bd\n"); 71ea0364f1SPeter Tyser goto error; 72ea0364f1SPeter Tyser } 73ea0364f1SPeter Tyser set_clocks_in_mhz(kbd); 74ea0364f1SPeter Tyser 7524507cf5SSimon Glass ret = image_setup_linux(images); 76ea0364f1SPeter Tyser if (ret) 77ea0364f1SPeter Tyser goto error; 78ea0364f1SPeter Tyser 7924507cf5SSimon Glass kernel = (void (*)(bd_t *, ulong, ulong, ulong, ulong))images->ep; 8024507cf5SSimon Glass 81ea0364f1SPeter Tyser debug("## Transferring control to Linux (at address %08lx) ...\n", 82ea0364f1SPeter Tyser (ulong) kernel); 83ea0364f1SPeter Tyser 84770605e4SSimon Glass bootstage_mark(BOOTSTAGE_ID_RUN_OS); 85ea0364f1SPeter Tyser 86ea0364f1SPeter Tyser /* 87ea0364f1SPeter Tyser * Linux Kernel Parameters (passing board info data): 88ea0364f1SPeter Tyser * sp+00: Ignore, side effect of using jsr to jump to kernel 89ea0364f1SPeter Tyser * sp+04: ptr to board info data 90ea0364f1SPeter Tyser * sp+08: initrd_start or 0 if no initrd 91ea0364f1SPeter Tyser * sp+12: initrd_end - unused if initrd_start is 0 92ea0364f1SPeter Tyser * sp+16: Start of command line string 93ea0364f1SPeter Tyser * sp+20: End of command line string 94ea0364f1SPeter Tyser */ 95ddc94378SSimon Glass (*kernel)(kbd, images->initrd_start, images->initrd_end, 96ddc94378SSimon Glass images->cmdline_start, images->cmdline_end); 97ea0364f1SPeter Tyser /* does not return */ 98ea0364f1SPeter Tyser error: 99ea0364f1SPeter Tyser return 1; 100ea0364f1SPeter Tyser } 101ea0364f1SPeter Tyser 102ea0364f1SPeter Tyser static ulong get_sp (void) 103ea0364f1SPeter Tyser { 104ea0364f1SPeter Tyser ulong sp; 105ea0364f1SPeter Tyser 106ea0364f1SPeter Tyser asm("movel %%a7, %%d0\n" 107ea0364f1SPeter Tyser "movel %%d0, %0\n": "=d"(sp): :"%d0"); 108ea0364f1SPeter Tyser 109ea0364f1SPeter Tyser return sp; 110ea0364f1SPeter Tyser } 111ea0364f1SPeter Tyser 112ea0364f1SPeter Tyser static void set_clocks_in_mhz (bd_t *kbd) 113ea0364f1SPeter Tyser { 114ea0364f1SPeter Tyser char *s; 115ea0364f1SPeter Tyser 116*00caae6dSSimon Glass s = env_get("clocks_in_mhz"); 117*00caae6dSSimon Glass if (s) { 118ea0364f1SPeter Tyser /* convert all clock information to MHz */ 119ea0364f1SPeter Tyser kbd->bi_intfreq /= 1000000L; 120ea0364f1SPeter Tyser kbd->bi_busfreq /= 1000000L; 121ea0364f1SPeter Tyser } 122ea0364f1SPeter Tyser } 123