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Diffstat (limited to 'arch/ppc/boot/simple/head.S')
| -rw-r--r-- | arch/ppc/boot/simple/head.S | 137 |
1 files changed, 0 insertions, 137 deletions
diff --git a/arch/ppc/boot/simple/head.S b/arch/ppc/boot/simple/head.S deleted file mode 100644 index 1b4d7b1d4ec..00000000000 --- a/arch/ppc/boot/simple/head.S +++ /dev/null @@ -1,137 +0,0 @@ -/* - * Initial board bringup code for many different boards. - * - * Author: Tom Rini - * trini@mvista.com - * Derived from arch/ppc/boot/prep/head.S (Cort Dougan, many others). - * - * 2001-2004 (c) MontaVista, Software, Inc. This file is licensed under - * the terms of the GNU General Public License version 2. This program - * is licensed "as is" without any warranty of any kind, whether express - * or implied. - */ - -#include <asm/reg.h> -#include <asm/cache.h> -#include <asm/ppc_asm.h> - - .text - -/* - * Begin at some arbitrary location in RAM or Flash - * Initialize core registers - * Configure memory controller (Not executing from RAM) - * Move the boot code to the link address (8M) - * Setup C stack - * Initialize UART - * Decompress the kernel to 0x0 - * Jump to the kernel entry - * - */ - - .globl start -start: - bl start_ -#ifdef CONFIG_IBM_OPENBIOS - /* The IBM "Tree" bootrom knows that the address of the bootrom - * read only structure is 4 bytes after _start. - */ - .long 0x62726f6d # structure ID - "brom" - .long 0x5f726f00 # - "_ro\0" - .long 1 # structure version - .long bootrom_cmdline # address of *bootrom_cmdline -#endif - -start_: -#ifdef CONFIG_FORCE - /* We have some really bad firmware. We must disable the L1 - * icache/dcache now or the board won't boot. - */ - li r4,0x0000 - isync - mtspr SPRN_HID0,r4 - sync - isync -#endif - -#if defined(CONFIG_MBX) || defined(CONFIG_RPX8260) || defined(CONFIG_PPC_PREP) - mr r29,r3 /* On the MBX860, r3 is the board info pointer. - * On the RPXSUPER, r3 points to the NVRAM - * configuration keys. - * On PReP, r3 is the pointer to the residual data. - */ -#endif - -#if defined(CONFIG_XILINX_VIRTEX_4_FX) - /* PPC errata 213: only for Virtex-4 FX */ - mfccr0 0 - oris 0,0,0x50000000@h - mtccr0 0 -#endif - - mflr r3 /* Save our actual starting address. */ - - /* The following functions we call must not modify r3 or r4..... - */ -#ifdef CONFIG_6xx - /* On PReP we must look at the OpenFirmware pointer and sanity - * test it. On other platforms, we disable the MMU right now - * and other bits. - */ -#ifdef CONFIG_PPC_PREP -/* - * Save the OF pointer to r25, but only if the entry point is in a sane - * location; if not we store 0. If there is no entry point, or it is - * invalid, we establish the default MSR value immediately. Otherwise, - * we defer doing that, to allow OF functions to be called, until we - * begin uncompressing the kernel. - */ - lis r8,0x0fff /* r8 = 0x0fffffff */ - ori r8,r8,0xffff - - subc r8,r8,r5 /* r8 = (r5 <= r8) ? ~0 : 0 */ - subfe r8,r8,r8 - nand r8,r8,r8 - - and. r5,r5,r8 /* r5 will be cleared if (r5 > r8) */ - bne+ haveOF - - li r8,MSR_IP|MSR_FP /* Not OF: set MSR immediately */ - mtmsr r8 - isync -haveOF: - mr r25,r5 -#else - bl disable_6xx_mmu -#endif - bl disable_6xx_l1cache - - CLEAR_CACHES -#endif - -#ifdef CONFIG_8xx - mfmsr r8 /* Turn off interrupts */ - li r9,0 - ori r9,r9,MSR_EE - andc r8,r8,r9 - mtmsr r8 - - /* We do this because some boot roms don't initialize the - * processor correctly. Don't do this if you want to debug - * using a BDM device. - */ - li r4,0 /* Zero DER to prevent FRZ */ - mtspr SPRN_DER,r4 -#endif - -#if defined(CONFIG_MBX) || defined(CONFIG_RPX8260) || defined(CONFIG_PPC_PREP) - mr r4,r29 /* put the board info pointer where the relocate - * routine will find it - */ -#endif - - /* Get the load address. - */ - subi r3, r3, 4 /* Get the actual IP, not NIP */ - b relocate - |