diff options
| -rw-r--r-- | arch/openrisc/lib/Makefile | 47 | ||||
| -rw-r--r-- | arch/openrisc/lib/board.c | 168 | ||||
| -rw-r--r-- | arch/openrisc/lib/bootm.c | 84 | ||||
| -rw-r--r-- | arch/openrisc/lib/timer.c | 104 |
4 files changed, 403 insertions, 0 deletions
diff --git a/arch/openrisc/lib/Makefile b/arch/openrisc/lib/Makefile new file mode 100644 index 0000000..db3c657 --- /dev/null +++ b/arch/openrisc/lib/Makefile @@ -0,0 +1,47 @@ +# +# (C) Copyright 2003-2006 +# Wolfgang Denk, DENX Software Engineering, wd@denx.de. +# +# 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 = $(obj)lib$(ARCH).o + +SOBJS-y += + +COBJS-y += board.o +COBJS-y += bootm.o +COBJS-y += timer.o + +SRCS := $(SOBJS-y:.o=.S) $(COBJS-y:.o=.c) +OBJS := $(addprefix $(obj),$(SOBJS-y) $(COBJS-y)) + +$(LIB): $(obj).depend $(OBJS) + $(call cmd_link_o_target, $(OBJS)) + +######################################################################### + +# defines $(obj).depend target +include $(SRCTREE)/rules.mk + +sinclude $(obj).depend + +######################################################################### diff --git a/arch/openrisc/lib/board.c b/arch/openrisc/lib/board.c new file mode 100644 index 0000000..85aa189 --- /dev/null +++ b/arch/openrisc/lib/board.c @@ -0,0 +1,168 @@ +/* + * (C) Copyright 2011 + * Julius Baxter, julius@opencores.org + * + * (C) Copyright 2003, Psyent Corporation <www.psyent.com> + * Scott McNutt <smcnutt@psyent.com> + * + * (C) Copyright 2000-2002 + * Wolfgang Denk, DENX Software Engineering, wd@denx.de. + * + * + * 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 <stdio_dev.h> +#include <watchdog.h> +#include <malloc.h> +#include <mmc.h> +#include <net.h> +#ifdef CONFIG_STATUS_LED +#include <status_led.h> +#endif +#ifdef CONFIG_CMD_NAND +#include <nand.h> /* cannot even include nand.h if it isnt configured */ +#endif + +#include <timestamp.h> +#include <version.h> + +DECLARE_GLOBAL_DATA_PTR; + +/* + * All attempts to come up with a "common" initialization sequence + * that works for all boards and architectures failed: some of the + * requirements are just _too_ different. To get rid of the resulting + * mess of board dependend #ifdef'ed code we now make the whole + * initialization sequence configurable to the user. + * + * The requirements for any new initalization function is simple: it + * receives a pointer to the "global data" structure as it's only + * argument, and returns an integer return code, where 0 means + * "continue" and != 0 means "fatal error, hang the system". + */ + +extern int cache_init(void); + +/* + * Initialization sequence + */ +static int (* const init_sequence[])(void) = { + cache_init, + timer_init, /* initialize timer */ + env_init, + serial_init, + console_init_f, + display_options, + checkcpu, + checkboard, +}; + + +/***********************************************************************/ +void board_init(void) +{ + bd_t *bd; + int i; + + gd = (gd_t *)CONFIG_SYS_GBL_DATA_ADDR; + + memset((void *)gd, 0, GENERATED_GBL_DATA_SIZE); + + gd->bd = (bd_t *)(gd+1); /* At end of global data */ + gd->baudrate = CONFIG_BAUDRATE; + gd->cpu_clk = CONFIG_SYS_CLK_FREQ; + + bd = gd->bd; + bd->bi_memstart = CONFIG_SYS_SDRAM_BASE; + bd->bi_memsize = CONFIG_SYS_SDRAM_SIZE; +#ifndef CONFIG_SYS_NO_FLASH + bd->bi_flashstart = CONFIG_SYS_FLASH_BASE; +#endif +#if defined(CONFIG_SYS_SRAM_BASE) && defined(CONFIG_SYS_SRAM_SIZE) + bd->bi_sramstart = CONFIG_SYS_SRAM_BASE; + bd->bi_sramsize = CONFIG_SYS_SRAM_SIZE; +#endif + bd->bi_baudrate = CONFIG_BAUDRATE; + + for (i = 0; i < ARRAY_SIZE(init_sequence); i++) { + WATCHDOG_RESET(); + if (init_sequence[i]()) + hang(); + } + + WATCHDOG_RESET(); + + /* The Malloc area is immediately below the monitor copy in RAM */ + mem_malloc_init(CONFIG_SYS_MALLOC_BASE, CONFIG_SYS_MALLOC_LEN); + +#ifndef CONFIG_SYS_NO_FLASH + WATCHDOG_RESET(); + bd->bi_flashsize = flash_init(); +#endif + +#ifdef CONFIG_CMD_NAND + puts("NAND: "); + nand_init(); +#endif + +#ifdef CONFIG_GENERIC_MMC + puts("MMC: "); + mmc_initialize(bd); +#endif + + WATCHDOG_RESET(); + env_relocate(); + + WATCHDOG_RESET(); + stdio_init(); + jumptable_init(); + console_init_r(); + + WATCHDOG_RESET(); + interrupt_init(); + +#if defined(CONFIG_BOARD_LATE_INIT) + board_late_init(); +#endif + +#if defined(CONFIG_CMD_NET) + puts("NET: "); + eth_initialize(bd); +#endif + + /* main_loop */ + for (;;) { + WATCHDOG_RESET(); + main_loop(); + } +} + + +/***********************************************************************/ + +void hang(void) +{ + disable_interrupts(); + puts("### ERROR ### Please reset board ###\n"); + + for (;;) + ; +} diff --git a/arch/openrisc/lib/bootm.c b/arch/openrisc/lib/bootm.c new file mode 100644 index 0000000..2c5d9ae --- /dev/null +++ b/arch/openrisc/lib/bootm.c @@ -0,0 +1,84 @@ +/* + * (C) Copyright 2011 Stefan Kristiansson <stefan.kristiansson@saunalahti.fi> + * + * Based on microblaze implementation by: + * (C) Copyright 2007 Michal Simek + * (C) Copyright 2004 Atmark Techno, Inc. + * + * Michal SIMEK <monstr@monstr.eu> + * Yasushi SHOJI <yashi@atmark-techno.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 + */ + +#include <common.h> +#include <command.h> +#include <image.h> +#include <u-boot/zlib.h> +#include <asm/byteorder.h> + +DECLARE_GLOBAL_DATA_PTR; + +int do_bootm_linux(int flag, int argc, char * const argv[], + bootm_headers_t *images) +{ + void (*kernel) (unsigned int); + ulong rd_data_start, rd_data_end; + + if ((flag != 0) && (flag != BOOTM_STATE_OS_GO)) + return 1; + + int ret; + + char *of_flat_tree = NULL; +#if defined(CONFIG_OF_LIBFDT) + /* did generic code already find a device tree? */ + if (images->ft_len) + of_flat_tree = images->ft_addr; +#endif + + kernel = (void (*)(unsigned int))images->ep; + + /* find ramdisk */ + ret = boot_get_ramdisk(argc, argv, images, IH_ARCH_OPENRISC, + &rd_data_start, &rd_data_end); + if (ret) + return 1; + + show_boot_progress(15); + + if (!of_flat_tree && argc > 3) + of_flat_tree = (char *)simple_strtoul(argv[3], NULL, 16); +#ifdef DEBUG + printf("## Transferring control to Linux (at address 0x%08lx) " \ + "ramdisk 0x%08lx, FDT 0x%08lx...\n", + (ulong) kernel, rd_data_start, (ulong) of_flat_tree); +#endif + if (dcache_status() || icache_status()) + flush_cache((ulong)kernel, max(checkdcache(), checkicache())); + + /* + * Linux Kernel Parameters (passing device tree): + * r3: pointer to the fdt, followed by the board info data + */ + kernel((unsigned int) of_flat_tree); + /* does not return */ + + return 1; +} diff --git a/arch/openrisc/lib/timer.c b/arch/openrisc/lib/timer.c new file mode 100644 index 0000000..4e92a31 --- /dev/null +++ b/arch/openrisc/lib/timer.c @@ -0,0 +1,104 @@ +/* + * (C) Copyright 2011, Stefan Kristiansson <stefan.kristiansson@saunalahti.fi> + * (C) Copyright 2011, Julius Baxter <julius@opencores.org> + * (C) Copyright 2003 + * Wolfgang Denk, DENX Software Engineering, wd@denx.de. + * + * 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 <asm/system.h> +#include <asm/openrisc_exc.h> + +static ulong timestamp; + +/* how many counter cycles in a jiffy */ +#define TIMER_COUNTER_CYCLES (CONFIG_SYS_CLK_FREQ/CONFIG_SYS_OPENRISC_TMR_HZ) +/* how many ms elapses between each timer interrupt */ +#define TIMER_TIMESTAMP_INC (1000/CONFIG_SYS_OPENRISC_TMR_HZ) +/* how many cycles per ms */ +#define TIMER_CYCLES_MS (CONFIG_SYS_CLK_FREQ/1000) +/* how many cycles per us */ +#define TIMER_CYCLES_US (CONFIG_SYS_CLK_FREQ/1000000uL) + +void timer_isr(void) +{ + timestamp += TIMER_TIMESTAMP_INC; + mtspr(SPR_TTMR, SPR_TTMR_IE | SPR_TTMR_RT | + (TIMER_COUNTER_CYCLES & SPR_TTMR_TP)); +} + +int timer_init(void) +{ + /* Install timer exception handler */ + exception_install_handler(EXC_TIMER, timer_isr); + + /* Set up the timer for the first expiration. */ + timestamp = 0; + + mtspr(SPR_TTMR, SPR_TTMR_IE | SPR_TTMR_RT | + (TIMER_COUNTER_CYCLES & SPR_TTMR_TP)); + + /* Enable tick timer exception in supervisor register */ + mtspr(SPR_SR, mfspr(SPR_SR) | SPR_SR_TEE); + + return 0; +} + +void reset_timer(void) +{ + timestamp = 0; + + mtspr(SPR_TTMR, SPR_TTMR_IE | SPR_TTMR_RT | + (TIMER_COUNTER_CYCLES & SPR_TTMR_TP)); +} + +/* + * The timer value in ms is calculated by taking the + * value accumulated by full timer revolutions plus the value + * accumulated in this period + */ +ulong get_timer(ulong base) +{ + return timestamp + mfspr(SPR_TTCR)/TIMER_CYCLES_MS - base; +} + +void set_timer(ulong t) +{ + reset_timer(); + timestamp = t; +} + +void __udelay(ulong usec) +{ + ulong elapsed = 0; + ulong tick; + ulong last_tick; + + last_tick = mfspr(SPR_TTCR); + while ((elapsed / TIMER_CYCLES_US) < usec) { + tick = mfspr(SPR_TTCR); + if (tick >= last_tick) + elapsed += (tick - last_tick); + else + elapsed += TIMER_COUNTER_CYCLES - (last_tick - tick); + last_tick = tick; + } +} |