diff options
Diffstat (limited to 'arch/sh/cpu/sh4')
| -rw-r--r-- | arch/sh/cpu/sh4/Makefile | 54 | ||||
| -rw-r--r-- | arch/sh/cpu/sh4/cache.c | 108 | ||||
| -rw-r--r-- | arch/sh/cpu/sh4/config.mk | 28 | ||||
| -rw-r--r-- | arch/sh/cpu/sh4/cpu.c | 93 | ||||
| -rw-r--r-- | arch/sh/cpu/sh4/interrupts.c | 38 | ||||
| -rw-r--r-- | arch/sh/cpu/sh4/start.S | 74 | ||||
| -rw-r--r-- | arch/sh/cpu/sh4/u-boot.lds | 99 | ||||
| -rw-r--r-- | arch/sh/cpu/sh4/watchdog.c | 71 |
8 files changed, 565 insertions, 0 deletions
diff --git a/arch/sh/cpu/sh4/Makefile b/arch/sh/cpu/sh4/Makefile new file mode 100644 index 0000000..3c96a49 --- /dev/null +++ b/arch/sh/cpu/sh4/Makefile @@ -0,0 +1,54 @@ +# +# (C) Copyright 2000-2006 +# Wolfgang Denk, DENX Software Engineering, wd@denx.de. +# +# (C) Copyright 2007 +# Nobuhiro Iwamatsu <iwamatsu@nigauri.org> +# +# 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 as +# published by the Free Software Foundation; either version 2 of +# the License, or (at your option) any later version. +# +# 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 $(TOPDIR)/config.mk + +LIB = $(obj)lib$(CPU).a + +SOBJS = start.o +COBJS = cpu.o interrupts.o watchdog.o cache.o + +SRCS := $(SOBJS:.o=.S) $(COBJS:.o=.c) +OBJS := $(addprefix $(obj),$(COBJS)) +SOBJS := $(addprefix $(obj),$(SOBJS)) + +$(LIB): $(OBJS) $(SOBJS) + $(AR) $(ARFLAGS) $@ $(OBJS) $(SOBJS) + +clean: + rm -f $(SOBJS) $(OBJS) + +distclean: clean + rm -f $(LIB) core *.bak $(obj).depend + +######################################################################### + +# defines $(obj).depend target +include $(SRCTREE)/rules.mk + +sinclude $(obj).depend + +######################################################################### diff --git a/arch/sh/cpu/sh4/cache.c b/arch/sh/cpu/sh4/cache.c new file mode 100644 index 0000000..377005c --- /dev/null +++ b/arch/sh/cpu/sh4/cache.c @@ -0,0 +1,108 @@ +/* + * (C) Copyright 2007 + * Nobuhiro Iwamatsu <iwamatsu@nigauri.org> + * + * 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 as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * 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 <command.h> +#include <asm/processor.h> +#include <asm/io.h> + +/* + * Jump to P2 area. + * When handling TLB or caches, we need to do it from P2 area. + */ +#define jump_to_P2() \ + do { \ + unsigned long __dummy; \ + __asm__ __volatile__( \ + "mov.l 1f, %0\n\t" \ + "or %1, %0\n\t" \ + "jmp @%0\n\t" \ + " nop\n\t" \ + ".balign 4\n" \ + "1: .long 2f\n" \ + "2:" \ + : "=&r" (__dummy) \ + : "r" (0x20000000)); \ + } while (0) + +/* + * Back to P1 area. + */ +#define back_to_P1() \ + do { \ + unsigned long __dummy; \ + __asm__ __volatile__( \ + "nop;nop;nop;nop;nop;nop;nop\n\t" \ + "mov.l 1f, %0\n\t" \ + "jmp @%0\n\t" \ + " nop\n\t" \ + ".balign 4\n" \ + "1: .long 2f\n" \ + "2:" \ + : "=&r" (__dummy)); \ + } while (0) + +#define CACHE_VALID 1 +#define CACHE_UPDATED 2 + +static inline void cache_wback_all(void) +{ + unsigned long addr, data, i, j; + + jump_to_P2(); + for (i = 0; i < CACHE_OC_NUM_ENTRIES; i++){ + for (j = 0; j < CACHE_OC_NUM_WAYS; j++) { + addr = CACHE_OC_ADDRESS_ARRAY | (j << CACHE_OC_WAY_SHIFT) + | (i << CACHE_OC_ENTRY_SHIFT); + data = inl(addr); + if (data & CACHE_UPDATED) { + data &= ~CACHE_UPDATED; + outl(data, addr); + } + } + } + back_to_P1(); +} + + +#define CACHE_ENABLE 0 +#define CACHE_DISABLE 1 + +int cache_control(unsigned int cmd) +{ + unsigned long ccr; + + jump_to_P2(); + ccr = inl(CCR); + + if (ccr & CCR_CACHE_ENABLE) + cache_wback_all(); + + if (cmd == CACHE_DISABLE) + outl(CCR_CACHE_STOP, CCR); + else + outl(CCR_CACHE_INIT, CCR); + back_to_P1(); + + return 0; +} diff --git a/arch/sh/cpu/sh4/config.mk b/arch/sh/cpu/sh4/config.mk new file mode 100644 index 0000000..b3feb2a --- /dev/null +++ b/arch/sh/cpu/sh4/config.mk @@ -0,0 +1,28 @@ +# +# (C) Copyright 2000-2004 +# Wolfgang Denk, DENX Software Engineering, wd@denx.de. +# +# (C) Copyright 2007 +# Nobuhiro Iwamatsu <iwamatsu@nigauri.org> +# +# 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 as +# published by the Free Software Foundation; either version 2 of +# the License, or (at your option) any later version. +# +# 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 +# +# +PLATFORM_CPPFLAGS += -m4-nofpu +PLATFORM_RELFLAGS += -ffixed-r13 diff --git a/arch/sh/cpu/sh4/cpu.c b/arch/sh/cpu/sh4/cpu.c new file mode 100644 index 0000000..be410ab --- /dev/null +++ b/arch/sh/cpu/sh4/cpu.c @@ -0,0 +1,93 @@ +/* + * (C) Copyright 2007 + * Nobuhiro Iwamatsu <iwamatsu@nigauri.org> + * + * 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 as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * 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 <command.h> +#include <netdev.h> +#include <asm/processor.h> +#include <asm/cache.h> + +int checkcpu(void) +{ + puts("CPU: SH4\n"); + return 0; +} + +int cpu_init (void) +{ + return 0; +} + +int cleanup_before_linux (void) +{ + disable_interrupts(); + return 0; +} + +int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]) +{ + disable_interrupts(); + reset_cpu (0); + return 0; +} + +void flush_cache (unsigned long addr, unsigned long size) +{ + dcache_invalid_range( addr , addr + size ); +} + +void icache_enable (void) +{ + cache_control(0); +} + +void icache_disable (void) +{ + cache_control(1); +} + +int icache_status (void) +{ + return 0; +} + +void dcache_enable (void) +{ +} + +void dcache_disable (void) +{ +} + +int dcache_status (void) +{ + return 0; +} + +int cpu_eth_init(bd_t *bis) +{ +#ifdef CONFIG_SH_ETHER + sh_eth_initialize(bis); +#endif + return 0; +} diff --git a/arch/sh/cpu/sh4/interrupts.c b/arch/sh/cpu/sh4/interrupts.c new file mode 100644 index 0000000..6988ecc --- /dev/null +++ b/arch/sh/cpu/sh4/interrupts.c @@ -0,0 +1,38 @@ +/* + * (C) Copyright 2007 + * Nobuhiro Iwamatsu <iwamatsu@nigauri.org> + * + * 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 as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * 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> + +int interrupt_init (void) +{ + return 0; +} + +void enable_interrupts (void) +{ + +} + +int disable_interrupts (void){ + return 0; +} diff --git a/arch/sh/cpu/sh4/start.S b/arch/sh/cpu/sh4/start.S new file mode 100644 index 0000000..711ae66 --- /dev/null +++ b/arch/sh/cpu/sh4/start.S @@ -0,0 +1,74 @@ +/* + * (C) Copyright 2007 + * Nobuhiro Iwamatsu <iwamatsu@nigauri.org> + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * 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 <config.h> +#include <version.h> + + .text + .align 2 + + .global _start +_start: + mov.l ._lowlevel_init, r0 +100: bsrf r0 + nop + + bsr 1f + nop +1: sts pr, r5 + mov.l ._reloc_dst, r4 + add #(_start-1b), r5 + mov.l ._reloc_dst_end, r6 + +2: mov.l @r5+, r1 + mov.l r1, @r4 + add #4, r4 + cmp/hs r6, r4 + bf 2b + + mov.l ._bss_start, r4 + mov.l ._bss_end, r5 + mov #0, r1 + +3: mov.l r1, @r4 /* bss clear */ + add #4, r4 + cmp/hs r5, r4 + bf 3b + + mov.l ._gd_init, r13 /* global data */ + mov.l ._stack_init, r15 /* stack */ + + mov.l ._sh_generic_init, r0 + jsr @r0 + nop + +loop: + bra loop + + .align 2 + +._lowlevel_init: .long (lowlevel_init - (100b + 4)) +._reloc_dst: .long reloc_dst +._reloc_dst_end: .long reloc_dst_end +._bss_start: .long bss_start +._bss_end: .long bss_end +._gd_init: .long (_start - CONFIG_SYS_GBL_DATA_SIZE) +._stack_init: .long (_start - CONFIG_SYS_GBL_DATA_SIZE - CONFIG_SYS_MALLOC_LEN - 16) +._sh_generic_init: .long sh_generic_init diff --git a/arch/sh/cpu/sh4/u-boot.lds b/arch/sh/cpu/sh4/u-boot.lds new file mode 100644 index 0000000..d3719df --- /dev/null +++ b/arch/sh/cpu/sh4/u-boot.lds @@ -0,0 +1,99 @@ +/* + * Copyright (C) 2007 + * Nobuhiro Iwamatsu <iwamatsu@nigauri.org> + * + * Copyright (C) 2008-2009 + * Yoshihiro Shimoda <shimoda.yoshihiro@renesas.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 as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * 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 + */ + +OUTPUT_FORMAT("elf32-sh-linux", "elf32-sh-linux", "elf32-sh-linux") +OUTPUT_ARCH(sh) +ENTRY(_start) + +SECTIONS +{ + /* + * entry and reloct_dst will be provided via ldflags + */ + . = .; + + PROVIDE (_ftext = .); + PROVIDE (_fcode = .); + PROVIDE (_start = .); + + .text : + { + arch/sh/cpu/sh4/start.o (.text) + . = ALIGN(8192); + common/env_embedded.o (.ppcenv) + . = ALIGN(8192); + common/env_embedded.o (.ppcenvr) + . = ALIGN(8192); + *(.text) + . = ALIGN(4); + } =0xFF + PROVIDE (_ecode = .); + .rodata : + { + *(SORT_BY_ALIGNMENT(SORT_BY_NAME(.rodata*))) + . = ALIGN(4); + } + PROVIDE (_etext = .); + + + PROVIDE (_fdata = .); + .data : + { + *(.data) + . = ALIGN(4); + } + PROVIDE (_edata = .); + + PROVIDE (_fgot = .); + .got : + { + *(.got) + . = ALIGN(4); + } + PROVIDE (_egot = .); + + PROVIDE (__u_boot_cmd_start = .); + .u_boot_cmd : + { + *(.u_boot_cmd) + . = ALIGN(4); + } + PROVIDE (__u_boot_cmd_end = .); + + PROVIDE (reloc_dst_end = .); + /* _reloc_dst_end = .; */ + + PROVIDE (bss_start = .); + PROVIDE (__bss_start = .); + .bss (NOLOAD) : + { + *(.bss) + . = ALIGN(4); + } + PROVIDE (bss_end = .); + + PROVIDE (_end = .); +} diff --git a/arch/sh/cpu/sh4/watchdog.c b/arch/sh/cpu/sh4/watchdog.c new file mode 100644 index 0000000..f692429 --- /dev/null +++ b/arch/sh/cpu/sh4/watchdog.c @@ -0,0 +1,71 @@ +/* + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * 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 <asm/processor.h> +#include <asm/io.h> + +#define WDT_BASE WTCNT + +#define WDT_WD (1 << 6) +#define WDT_RST_P (0) +#define WDT_RST_M (1 << 5) +#define WDT_ENABLE (1 << 7) + +#if defined(CONFIG_WATCHDOG) +static unsigned char csr_read(void) +{ + return inb(WDT_BASE + 0x04); +} + +static void cnt_write(unsigned char value) +{ + outl((unsigned short)value | 0x5A00, WDT_BASE + 0x00); +} + +static void csr_write(unsigned char value) +{ + outl((unsigned short)value | 0xA500, WDT_BASE + 0x04); +} + +void watchdog_reset(void) +{ + outl(0x55000000, WDT_BASE + 0x08); +} + +int watchdog_init(void) +{ + /* Set overflow time*/ + cnt_write(0); + /* Power on reset */ + csr_write(WDT_WD|WDT_RST_P|WDT_ENABLE); + + return 0; +} + +int watchdog_disable(void) +{ + csr_write(csr_read() & ~WDT_ENABLE); + return 0; +} +#endif + +void reset_cpu(unsigned long ignored) +{ + while (1) + ; +} |