1 /* 2 * Copyright (c) 2011 The Chromium OS Authors. 3 * Copyright (c) 2015 Sjoerd Simons <sjoerd.simons@collabora.co.uk> 4 * SPDX-License-Identifier: GPL-2.0+ 5 */ 6 7 #include <common.h> 8 #include <asm/io.h> 9 10 DECLARE_GLOBAL_DATA_PTR; 11 12 #define LINUX_ARM_ZIMAGE_MAGIC 0x016f2818 13 14 struct arm_z_header { 15 uint32_t code[9]; 16 uint32_t zi_magic; 17 uint32_t zi_start; 18 uint32_t zi_end; 19 } __attribute__ ((__packed__)); 20 21 int bootz_setup(ulong image, ulong *start, ulong *end) 22 { 23 uint8_t *zimage = map_sysmem(image, 0); 24 struct arm_z_header *arm_hdr = (struct arm_z_header *)zimage; 25 int ret = 0; 26 27 if (memcmp(zimage + 0x202, "HdrS", 4) == 0) { 28 uint8_t setup_sects = *(zimage + 0x1f1); 29 uint32_t syssize = 30 le32_to_cpu(*(uint32_t *)(zimage + 0x1f4)); 31 32 *start = 0; 33 *end = (setup_sects + 1) * 512 + syssize * 16; 34 35 printf("setting up X86 zImage [ %ld - %ld ]\n", 36 *start, *end); 37 } else if (le32_to_cpu(arm_hdr->zi_magic) == LINUX_ARM_ZIMAGE_MAGIC) { 38 *start = le32_to_cpu(arm_hdr->zi_start); 39 *end = le32_to_cpu(arm_hdr->zi_end); 40 41 printf("setting up ARM zImage [ %ld - %ld ]\n", 42 *start, *end); 43 } else { 44 printf("Unrecognized zImage\n"); 45 ret = 1; 46 } 47 48 unmap_sysmem((void *)image); 49 50 return ret; 51 } 52 53 int do_bootm_linux(int flag, int argc, char *argv[], bootm_headers_t *images) 54 { 55 if (flag & (BOOTM_STATE_OS_GO | BOOTM_STATE_OS_FAKE_GO)) { 56 bootstage_mark(BOOTSTAGE_ID_RUN_OS); 57 printf("## Transferring control to Linux (at address %08lx)...\n", 58 images->ep); 59 reset_cpu(0); 60 } 61 62 return 0; 63 } 64