openrisc: Add library functions

Signed-off-by: NStefan Kristiansson <stefan.kristiansson@saunalahti.fi>

arch/openrisc/lib/Makefile

+#
+# (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
+
+#########################################################################

arch/openrisc/lib/board.c

+/*
+ * (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 (;;)
+		;
+}

arch/openrisc/lib/bootm.c

+/*
+ * (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;
+}

arch/openrisc/lib/timer.c

+/*
+ * (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;
+	}
+}