diff options
Diffstat (limited to 'arch/arm/cpu/uncompress.c')
-rw-r--r-- | arch/arm/cpu/uncompress.c | 108 |
1 files changed, 108 insertions, 0 deletions
diff --git a/arch/arm/cpu/uncompress.c b/arch/arm/cpu/uncompress.c new file mode 100644 index 0000000000..b401f8efe2 --- /dev/null +++ b/arch/arm/cpu/uncompress.c @@ -0,0 +1,108 @@ +/* + * uncompress.c - uncompressor code for self extracing pbl image + * + * Copyright (c) 2010-2013 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix + * Copyright (c) 2012 Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> + * + * See file CREDITS for list of people who contributed to this + * project. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 + * as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + +#include <common.h> +#include <init.h> +#include <sizes.h> +#include <pbl.h> +#include <asm/barebox-arm.h> +#include <asm/barebox-arm-head.h> +#include <asm-generic/memory_layout.h> +#include <asm/sections.h> +#include <asm/pgtable.h> +#include <asm/cache.h> + +#include <debug_ll.h> + +#include "mmu-early.h" + +unsigned long free_mem_ptr; +unsigned long free_mem_end_ptr; + +static int __attribute__((__used__)) + __attribute__((__section__(".image_end"))) + __image_end_dummy = 0xdeadbeef; + +static void noinline uncompress(uint32_t membase, + uint32_t memsize, uint32_t boarddata) +{ + uint32_t offset; + uint32_t pg_len; + void __noreturn (*barebox)(uint32_t, uint32_t, uint32_t); + uint32_t endmem = membase + memsize; + unsigned long barebox_base; + uint32_t *ptr; + void *pg_start; + + endmem -= STACK_SIZE; /* stack */ + + if (IS_ENABLED(CONFIG_PBL_RELOCATABLE)) + relocate_to_current_adr(); + + /* Get offset between linked address and runtime address */ + offset = get_runtime_offset(); + + if (IS_ENABLED(CONFIG_RELOCATABLE)) + barebox_base = arm_barebox_image_place(membase + memsize); + else + barebox_base = TEXT_BASE; + + setup_c(); + + if (IS_ENABLED(CONFIG_MMU_EARLY)) { + endmem &= ~0x3fff; + endmem -= SZ_16K; /* ttb */ + mmu_early_enable(membase, memsize, endmem); + } + + endmem -= SZ_128K; /* early malloc */ + free_mem_ptr = endmem; + free_mem_end_ptr = free_mem_ptr + SZ_128K; + + ptr = (void *)__image_end; + pg_start = ptr + 1; + pg_len = *(ptr); + + pbl_barebox_uncompress((void*)barebox_base, pg_start, pg_len); + + arm_early_mmu_cache_flush(); + flush_icache(); + + if (IS_ENABLED(CONFIG_THUMB2_BAREBOX)) + barebox = (void *)(barebox_base + 1); + else + barebox = (void *)barebox_base; + + barebox(membase, memsize, boarddata); +} + +/* + * Generic second stage pbl uncompressor entry + */ +ENTRY_FUNCTION(start_uncompress)(uint32_t membase, uint32_t memsize, + uint32_t boarddata) +{ + arm_setup_stack(membase + memsize - 16); + + uncompress(membase, memsize, boarddata); +} |