diff options
Diffstat (limited to 'arch/arm/cpu/armv7/mx6/hab.c')
| -rw-r--r-- | arch/arm/cpu/armv7/mx6/hab.c | 169 |
1 files changed, 168 insertions, 1 deletions
diff --git a/arch/arm/cpu/armv7/mx6/hab.c b/arch/arm/cpu/armv7/mx6/hab.c index f6810a6..8dee595 100644 --- a/arch/arm/cpu/armv7/mx6/hab.c +++ b/arch/arm/cpu/armv7/mx6/hab.c @@ -1,12 +1,14 @@ /* - * Copyright (C) 2010-2013 Freescale Semiconductor, Inc. + * Copyright (C) 2010-2014 Freescale Semiconductor, Inc. * * SPDX-License-Identifier: GPL-2.0+ */ #include <common.h> #include <asm/io.h> +#include <asm/system.h> #include <asm/arch/hab.h> +#include <asm/arch/clock.h> #include <asm/arch/sys_proto.h> /* -------- start of HAB API updates ------------*/ @@ -71,6 +73,44 @@ ((hab_rvt_exit_t *)HAB_RVT_EXIT) \ ) +#define IVT_SIZE 0x20 +#define ALIGN_SIZE 0x1000 +#define CSF_PAD_SIZE 0x2000 +#define MX6DQ_PU_IROM_MMU_EN_VAR 0x009024a8 +#define MX6DLS_PU_IROM_MMU_EN_VAR 0x00901dd0 +#define MX6SL_PU_IROM_MMU_EN_VAR 0x00900a18 + +/* + * +------------+ 0x0 (DDR_UIMAGE_START) - + * | Header | | + * +------------+ 0x40 | + * | | | + * | | | + * | | | + * | | | + * | Image Data | | + * . | | + * . | > Stuff to be authenticated ----+ + * . | | | + * | | | | + * | | | | + * +------------+ | | + * | | | | + * | Fill Data | | | + * | | | | + * +------------+ Align to ALIGN_SIZE | | + * | IVT | | | + * +------------+ + IVT_SIZE - | + * | | | + * | CSF DATA | <---------------------------------------------------------+ + * | | + * +------------+ + * | | + * | Fill Data | + * | | + * +------------+ + CSF_PAD_SIZE + */ + bool is_hab_enabled(void) { struct ocotp_regs *ocotp = (struct ocotp_regs *)OCOTP_BASE_ADDR; @@ -144,6 +184,108 @@ int get_hab_status(void) return 0; } +uint32_t authenticate_image(uint32_t ddr_start, uint32_t image_size) +{ + uint32_t load_addr = 0; + size_t bytes; + ptrdiff_t ivt_offset = 0; + int result = 0; + ulong start; + hab_rvt_authenticate_image_t *hab_rvt_authenticate_image; + hab_rvt_entry_t *hab_rvt_entry; + hab_rvt_exit_t *hab_rvt_exit; + + hab_rvt_authenticate_image = hab_rvt_authenticate_image_p; + hab_rvt_entry = hab_rvt_entry_p; + hab_rvt_exit = hab_rvt_exit_p; + + if (is_hab_enabled()) { + printf("\nAuthenticate image from DDR location 0x%x...\n", + ddr_start); + + hab_caam_clock_enable(1); + + if (hab_rvt_entry() == HAB_SUCCESS) { + /* If not already aligned, Align to ALIGN_SIZE */ + ivt_offset = (image_size + ALIGN_SIZE - 1) & + ~(ALIGN_SIZE - 1); + + start = ddr_start; + bytes = ivt_offset + IVT_SIZE + CSF_PAD_SIZE; +#ifdef DEBUG + printf("\nivt_offset = 0x%x, ivt addr = 0x%x\n", + ivt_offset, ddr_start + ivt_offset); + puts("Dumping IVT\n"); + print_buffer(ddr_start + ivt_offset, + (void *)(ddr_start + ivt_offset), + 4, 0x8, 0); + + puts("Dumping CSF Header\n"); + print_buffer(ddr_start + ivt_offset+IVT_SIZE, + (void *)(ddr_start + ivt_offset+IVT_SIZE), + 4, 0x10, 0); + + get_hab_status(); + + puts("\nCalling authenticate_image in ROM\n"); + printf("\tivt_offset = 0x%x\n", ivt_offset); + printf("\tstart = 0x%08lx\n", start); + printf("\tbytes = 0x%x\n", bytes); +#endif + /* + * If the MMU is enabled, we have to notify the ROM + * code, or it won't flush the caches when needed. + * This is done, by setting the "pu_irom_mmu_enabled" + * word to 1. You can find its address by looking in + * the ROM map. This is critical for + * authenticate_image(). If MMU is enabled, without + * setting this bit, authentication will fail and may + * crash. + */ + /* Check MMU enabled */ + if (get_cr() & CR_M) { + if (is_cpu_type(MXC_CPU_MX6Q) || + is_cpu_type(MXC_CPU_MX6D)) { + /* + * This won't work on Rev 1.0.0 of + * i.MX6Q/D, since their ROM doesn't + * do cache flushes. don't think any + * exist, so we ignore them. + */ + writel(1, MX6DQ_PU_IROM_MMU_EN_VAR); + } else if (is_cpu_type(MXC_CPU_MX6DL) || + is_cpu_type(MXC_CPU_MX6SOLO)) { + writel(1, MX6DLS_PU_IROM_MMU_EN_VAR); + } else if (is_cpu_type(MXC_CPU_MX6SL)) { + writel(1, MX6SL_PU_IROM_MMU_EN_VAR); + } + } + + load_addr = (uint32_t)hab_rvt_authenticate_image( + HAB_CID_UBOOT, + ivt_offset, (void **)&start, + (size_t *)&bytes, NULL); + if (hab_rvt_exit() != HAB_SUCCESS) { + puts("hab exit function fail\n"); + load_addr = 0; + } + } else { + puts("hab entry function fail\n"); + } + + hab_caam_clock_enable(0); + + get_hab_status(); + } else { + puts("hab fuse not enabled\n"); + } + + if ((!is_hab_enabled()) || (load_addr != 0)) + result = 1; + + return result; +} + int do_hab_status(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) { if ((argc != 1)) { @@ -156,8 +298,33 @@ int do_hab_status(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) return 0; } +static int do_authenticate_image(cmd_tbl_t *cmdtp, int flag, int argc, + char * const argv[]) +{ + ulong addr, ivt_offset; + int rcode = 0; + + if (argc < 3) + return CMD_RET_USAGE; + + addr = simple_strtoul(argv[1], NULL, 16); + ivt_offset = simple_strtoul(argv[2], NULL, 16); + + rcode = authenticate_image(addr, ivt_offset); + + return rcode; +} + U_BOOT_CMD( hab_status, CONFIG_SYS_MAXARGS, 1, do_hab_status, "display HAB status", "" ); + +U_BOOT_CMD( + hab_auth_img, 3, 0, do_authenticate_image, + "authenticate image via HAB", + "addr ivt_offset\n" + "addr - image hex address\n" + "ivt_offset - hex offset of IVT in the image" + ); |