diff options
Diffstat (limited to 'arch/sh64/boot/compressed/head.S')
| -rw-r--r-- | arch/sh64/boot/compressed/head.S | 164 |
1 files changed, 0 insertions, 164 deletions
diff --git a/arch/sh64/boot/compressed/head.S b/arch/sh64/boot/compressed/head.S deleted file mode 100644 index 82040b1a29cf..000000000000 --- a/arch/sh64/boot/compressed/head.S +++ /dev/null @@ -1,164 +0,0 @@ -/* - * This file is subject to the terms and conditions of the GNU General Public - * License. See the file "COPYING" in the main directory of this archive - * for more details. - * - * arch/shmedia/boot/compressed/head.S - * - * Copied from - * arch/shmedia/kernel/head.S - * which carried the copyright: - * Copyright (C) 2000, 2001 Paolo Alberelli - * - * Modification for compressed loader: - * Copyright (C) 2002 Stuart Menefy (stuart.menefy@st.com) - */ - -#include <linux/linkage.h> -#include <asm/registers.h> -#include <asm/cache.h> -#include <asm/mmu_context.h> - -/* - * Fixed TLB entries to identity map the beginning of RAM - */ -#define MMUIR_TEXT_H 0x0000000000000003 | CONFIG_MEMORY_START - /* Enabled, Shared, ASID 0, Eff. Add. 0xA0000000 */ -#define MMUIR_TEXT_L 0x000000000000009a | CONFIG_MEMORY_START - /* 512 Mb, Cacheable (Write-back), execute, Not User, Ph. Add. */ - -#define MMUDR_CACHED_H 0x0000000000000003 | CONFIG_MEMORY_START - /* Enabled, Shared, ASID 0, Eff. Add. 0xA0000000 */ -#define MMUDR_CACHED_L 0x000000000000015a | CONFIG_MEMORY_START - /* 512 Mb, Cacheable (Write-back), read/write, Not User, Ph. Add. */ - -#define ICCR0_INIT_VAL ICCR0_ON | ICCR0_ICI /* ICE + ICI */ -#define ICCR1_INIT_VAL ICCR1_NOLOCK /* No locking */ - -#if 1 -#define OCCR0_INIT_VAL OCCR0_ON | OCCR0_OCI | OCCR0_WB /* OCE + OCI + WB */ -#else -#define OCCR0_INIT_VAL OCCR0_OFF -#endif -#define OCCR1_INIT_VAL OCCR1_NOLOCK /* No locking */ - - .text - - .global startup -startup: - /* - * Prevent speculative fetch on device memory due to - * uninitialized target registers. - * This must be executed before the first branch. - */ - ptabs/u ZERO, tr0 - ptabs/u ZERO, tr1 - ptabs/u ZERO, tr2 - ptabs/u ZERO, tr3 - ptabs/u ZERO, tr4 - ptabs/u ZERO, tr5 - ptabs/u ZERO, tr6 - ptabs/u ZERO, tr7 - synci - - /* - * Set initial TLB entries for cached and uncached regions. - * Note: PTA/BLINK is PIC code, PTABS/BLINK isn't ! - */ - /* Clear ITLBs */ - pta 1f, tr1 - movi ITLB_FIXED, r21 - movi ITLB_LAST_VAR_UNRESTRICTED+TLB_STEP, r22 -1: putcfg r21, 0, ZERO /* Clear MMUIR[n].PTEH.V */ - addi r21, TLB_STEP, r21 - bne r21, r22, tr1 - - /* Clear DTLBs */ - pta 1f, tr1 - movi DTLB_FIXED, r21 - movi DTLB_LAST_VAR_UNRESTRICTED+TLB_STEP, r22 -1: putcfg r21, 0, ZERO /* Clear MMUDR[n].PTEH.V */ - addi r21, TLB_STEP, r21 - bne r21, r22, tr1 - - /* Map one big (512Mb) page for ITLB */ - movi ITLB_FIXED, r21 - movi MMUIR_TEXT_L, r22 /* PTEL first */ - putcfg r21, 1, r22 /* Set MMUIR[0].PTEL */ - movi MMUIR_TEXT_H, r22 /* PTEH last */ - putcfg r21, 0, r22 /* Set MMUIR[0].PTEH */ - - /* Map one big CACHED (512Mb) page for DTLB */ - movi DTLB_FIXED, r21 - movi MMUDR_CACHED_L, r22 /* PTEL first */ - putcfg r21, 1, r22 /* Set MMUDR[0].PTEL */ - movi MMUDR_CACHED_H, r22 /* PTEH last */ - putcfg r21, 0, r22 /* Set MMUDR[0].PTEH */ - - /* ICache */ - movi ICCR_BASE, r21 - movi ICCR0_INIT_VAL, r22 - movi ICCR1_INIT_VAL, r23 - putcfg r21, ICCR_REG0, r22 - putcfg r21, ICCR_REG1, r23 - synci - - /* OCache */ - movi OCCR_BASE, r21 - movi OCCR0_INIT_VAL, r22 - movi OCCR1_INIT_VAL, r23 - putcfg r21, OCCR_REG0, r22 - putcfg r21, OCCR_REG1, r23 - synco - - /* - * Enable the MMU. - * From here-on code can be non-PIC. - */ - movi SR_HARMLESS | SR_ENABLE_MMU, r22 - putcon r22, SSR - movi 1f, r22 - putcon r22, SPC - synco - rte /* And now go into the hyperspace ... */ -1: /* ... that's the next instruction ! */ - - /* Set initial stack pointer */ - movi datalabel stack_start, r0 - ld.l r0, 0, r15 - - /* - * Clear bss - */ - pt 1f, tr1 - movi datalabel __bss_start, r22 - movi datalabel _end, r23 -1: st.l r22, 0, ZERO - addi r22, 4, r22 - bne r22, r23, tr1 - - /* - * Decompress the kernel. - */ - pt decompress_kernel, tr0 - blink tr0, r18 - - /* - * Disable the MMU. - */ - movi SR_HARMLESS, r22 - putcon r22, SSR - movi 1f, r22 - putcon r22, SPC - synco - rte /* And now go into the hyperspace ... */ -1: /* ... that's the next instruction ! */ - - /* Jump into the decompressed kernel */ - movi datalabel (CONFIG_MEMORY_START + 0x2000)+1, r19 - ptabs r19, tr0 - blink tr0, r18 - - /* Shouldn't return here, but just in case, loop forever */ - pt 1f, tr0 -1: blink tr0, ZERO |