patch-2.4.20 linux-2.4.20/arch/mips/sibyte/cfe/setup.c

• Lines: 388
• Date: Thu Nov 28 15:53:10 2002
• Orig file: linux-2.4.19/arch/mips/sibyte/cfe/setup.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -urN linux-2.4.19/arch/mips/sibyte/cfe/setup.c linux-2.4.20/arch/mips/sibyte/cfe/setup.c
@@ -0,0 +1,387 @@
+/*
+ * Copyright (C) 2000, 2001 Broadcom Corporation
+ *
+ * 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 <linux/config.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/blk.h>
+#include <linux/bootmem.h>
+#include <linux/smp.h>
+#include <linux/console.h>
+
+#include <asm/bootinfo.h>
+#include <asm/reboot.h>
+#include <asm/sibyte/board.h>
+
+#include "cfe_xiocb.h"
+#include "cfe_api.h"
+#include "cfe_error.h"
+
+/* Max ram addressable in 32-bit segments */
+#ifdef CONFIG_MIPS64
+#define MAX_RAM_SIZE (~0ULL)
+#else
+#ifdef CONFIG_HIGHMEM
+#ifdef CONFIG_64BIT_PHYS_ADDR
+#define MAX_RAM_SIZE (~0ULL)
+#else
+#define MAX_RAM_SIZE (0xffffffffULL)
+#endif
+#else
+#define MAX_RAM_SIZE (0x1fffffffULL)
+#endif
+#endif
+
+#define SB1250_DUART_MINOR_BASE		192 /* XXXKW put this somewhere sane */
+#define SB1250_PROMICE_MINOR_BASE	191 /* XXXKW put this somewhere sane */
+kdev_t cfe_consdev;
+
+#define SIBYTE_MAX_MEM_REGIONS 8
+phys_t board_mem_region_addrs[SIBYTE_MAX_MEM_REGIONS];
+phys_t board_mem_region_sizes[SIBYTE_MAX_MEM_REGIONS];
+unsigned int board_mem_region_count;
+
+/* This is the kernel command line.  Actually, it's
+   copied, eventually, to command_line, and looks to be
+   quite redundant.  But not something to fix just now */
+extern char arcs_cmdline[];
+
+#ifdef CONFIG_EMBEDDED_RAMDISK
+/* These are symbols defined by the ramdisk linker script */
+extern unsigned char __rd_start;
+extern unsigned char __rd_end;
+#endif
+
+#ifdef CONFIG_SMP
+static int reboot_smp = 0;
+#endif
+
+static void cfe_linux_exit(void)
+{
+#ifdef CONFIG_SMP
+	if (smp_processor_id()) {
+		if (reboot_smp) {
+			/* Don't repeat the process from another CPU */
+			for (;;);
+		} else {
+			/* Get CPU 0 to do the cfe_exit */
+			reboot_smp = 1;
+			smp_call_function((void *)_machine_restart, NULL, 1, 0);
+			for (;;);
+		}
+	}
+#endif
+	printk("passing control back to CFE\n");
+	cfe_exit(1, 0);
+	printk("cfe_exit returned??\n");
+	while(1);
+}
+
+static __init void prom_meminit(void)
+{
+	u64 addr, size; /* regardless of 64BIT_PHYS_ADDR */
+	long type;
+	unsigned int idx;
+	int rd_flag;
+#ifdef CONFIG_BLK_DEV_INITRD
+	unsigned long initrd_pstart;
+	unsigned long initrd_pend;
+
+#ifdef CONFIG_EMBEDDED_RAMDISK
+	/* If we're using an embedded ramdisk, then __rd_start and __rd_end
+	   are defined by the linker to be on either side of the ramdisk
+	   area.  Otherwise, initrd_start should be defined by kernel command
+	   line arguments */
+	if (initrd_start == 0) {
+		initrd_start = (unsigned long)&__rd_start;
+		initrd_end = (unsigned long)&__rd_end;
+	}
+#endif
+
+	initrd_pstart = __pa(initrd_start);
+	initrd_pend = __pa(initrd_end);
+	if (initrd_start &&
+	    ((initrd_pstart > MAX_RAM_SIZE)
+	     || (initrd_pend > MAX_RAM_SIZE))) {
+		panic("initrd out of addressable memory");
+	}
+
+#endif /* INITRD */
+
+	for (idx = 0; cfe_enummem(idx, &addr, &size, &type) != CFE_ERR_NOMORE;
+	     idx++) {
+		rd_flag = 0;
+		if (type == CFE_MI_AVAILABLE) {
+			/*
+			 * See if this block contains (any portion of) the
+			 * ramdisk
+			 */
+#ifdef CONFIG_BLK_DEV_INITRD
+			if (initrd_start) {
+				if ((initrd_pstart > addr) &&
+				    (initrd_pstart < (addr + size))) {
+					add_memory_region(addr,
+					                  initrd_pstart - addr,
+					                  BOOT_MEM_RAM);
+					rd_flag = 1;
+				}
+				if ((initrd_pend > addr) &&
+				    (initrd_pend < (addr + size))) {
+					add_memory_region(initrd_pend,
+						(addr + size) - initrd_pend,
+						 BOOT_MEM_RAM);
+					rd_flag = 1;
+				}
+			}
+#endif
+			if (!rd_flag) {
+				if (addr > MAX_RAM_SIZE)
+					continue;
+				if (addr+size > MAX_RAM_SIZE)
+					size = MAX_RAM_SIZE - (addr+size) + 1;
+				/*
+				 * memcpy/__copy_user prefetch, which
+				 * will cause a bus error for
+				 * KSEG/KUSEG addrs not backed by RAM.
+				 * Hence, reserve some padding for the
+				 * prefetch distance.
+				 */
+				if (size > 512)
+					size -= 512;
+				add_memory_region(addr, size, BOOT_MEM_RAM);
+			}
+			board_mem_region_addrs[board_mem_region_count] = addr;
+			board_mem_region_sizes[board_mem_region_count] = size;
+			board_mem_region_count++;
+			if (board_mem_region_count ==
+			    SIBYTE_MAX_MEM_REGIONS) {
+				/*
+				 * Too many regions.  Need to configure more
+				 */
+				while(1);
+			}
+		}
+	}
+#ifdef CONFIG_BLK_DEV_INITRD
+	if (initrd_start) {
+		add_memory_region(initrd_pstart, initrd_pend - initrd_pstart,
+				  BOOT_MEM_RESERVED);
+	}
+#endif
+}
+
+#ifdef CONFIG_BLK_DEV_INITRD
+static int __init initrd_setup(char *str)
+{
+	/*
+	 *Initrd location comes in the form "<hex size of ramdisk in bytes>@<location in memory>"
+	 *  e.g. initrd=3abfd@80010000.  This is set up by the loader.
+	 */
+	char *tmp, *endptr;
+	unsigned long initrd_size;
+	for (tmp = str; *tmp != '@'; tmp++) {
+		if (!*tmp) {
+			goto fail;
+		}
+	}
+	*tmp = 0;
+	tmp++;
+	if (!*tmp) {
+		goto fail;
+	}
+	initrd_size = simple_strtol(str, &endptr, 16);
+	if (*endptr) {
+		*(tmp-1) = '@';
+		goto fail;
+	}
+	*(tmp-1) = '@';
+	initrd_start = simple_strtol(tmp, &endptr, 16);
+	if (*endptr) {
+		goto fail;
+	}
+	initrd_end = initrd_start + initrd_size;
+	printk("Found initrd of %lx@%lx\n", initrd_size, initrd_start);
+	return 1;
+ fail:
+	printk("Bad initrd argument.  Disabling initrd\n");
+	initrd_start = 0;
+	initrd_end = 0;
+	return 1;
+}
+
+#endif
+
+/*
+ * prom_init is called just after the cpu type is determined, from init_arch()
+ */
+__init int prom_init(int argc, char **argv, char **envp, int *prom_vec)
+{
+	_machine_restart   = (void (*)(char *))cfe_linux_exit;
+	_machine_halt      = cfe_linux_exit;
+	_machine_power_off = cfe_linux_exit;
+
+	/*
+	 * This should go away.  Detect if we're booting
+	 * straight from cfe without a loader.  If we
+	 * are, then we've got a prom vector in a0.  Otherwise,
+	 * argc (and argv and envp, for that matter) will be 0)
+	 */
+	if (argc < 0) {
+		prom_vec = (int *)argc;
+	}
+	cfe_init((long)prom_vec);
+	cfe_open_console();
+	if (cfe_getenv("LINUX_CMDLINE", arcs_cmdline, CL_SIZE) < 0) {
+		if (argc < 0) {
+			/*
+			 * It's OK for direct boot to not provide a
+			 *  command line
+			 */
+			strcpy(arcs_cmdline, "root=/dev/ram0 ");
+#ifdef CONFIG_SIBYTE_PTSWARM
+			strcat(arcs_cmdline, "console=ttyS0,115200 ");
+#endif
+		} else {
+			/* The loader should have set the command line */
+			panic("LINUX_CMDLINE not defined in cfe.");
+		}
+	}
+
+#ifdef CONFIG_BLK_DEV_INITRD
+	{
+		char *ptr;
+		/* Need to find out early whether we've got an initrd.  So scan
+		   the list looking now */
+		for (ptr = arcs_cmdline; *ptr; ptr++) {
+			while (*ptr == ' ') {
+				ptr++;
+			}
+			if (!strncmp(ptr, "initrd=", 7)) {
+				initrd_setup(ptr+7);
+				break;
+			} else {
+				while (*ptr && (*ptr != ' ')) {
+					ptr++;
+				}
+			}
+		}
+	}
+#endif /* CONFIG_BLK_DEV_INITRD */
+
+	/* Not sure this is needed, but it's the safe way. */
+	arcs_cmdline[CL_SIZE-1] = 0;
+
+	mips_machgroup = MACH_GROUP_SIBYTE;
+	prom_meminit();
+
+	return 0;
+}
+
+void prom_free_prom_memory(void)
+{
+	/* Not sure what I'm supposed to do here.  Nothing, I think */
+}
+
+int page_is_ram(unsigned long pagenr)
+{
+	phys_t addr = pagenr << PAGE_SHIFT;
+	int i;
+	for (i = 0; i < board_mem_region_count; i++) {
+		if ((addr >= board_mem_region_addrs[i])
+		    && (addr < (board_mem_region_addrs[i] + board_mem_region_sizes[i]))) {
+			return 1;
+		}
+	}
+	return 0;
+}
+
+#ifdef CONFIG_SIBYTE_CFE_CONSOLE
+
+static void cfe_console_write(struct console *cons, const char *str,
+                              unsigned int count)
+{
+	int i, last;
+
+	for (i=0,last=0; i<count; i++) {
+		if (!str[i])
+			/* XXXKW can/should this ever happen? */
+			panic("cfe_console_write with NULL");
+		if (str[i] == '\n') {
+			cfe_console_print(&str[last], i-last);
+			cfe_console_print("\r", 1);
+			last = i;
+		}
+	}
+	if (last != count)
+		cfe_console_print(&str[last], count-last);
+}
+
+static kdev_t cfe_console_device(struct console *c)
+{
+	return cfe_consdev;
+}
+
+static int cfe_console_setup(struct console *cons, char *str)
+{
+	char consdev[32];
+	cfe_open_console();
+	/* XXXKW think about interaction with 'console=' cmdline arg */
+	/* If none of the console options are configured, the build will break. */
+	if (cfe_getenv("BOOT_CONSOLE", consdev, 32) >= 0) {
+#ifdef CONFIG_SIBYTE_SB1250_DUART
+		if (!strcmp(consdev, "uart0")) {
+			setleds("u0cn");
+			cfe_consdev = MKDEV(TTY_MAJOR, SB1250_DUART_MINOR_BASE + 0);
+#ifndef CONFIG_SIBYTE_SB1250_DUART_NO_PORT_1
+		} else if (!strcmp(consdev, "uart1")) {
+			setleds("u1cn");
+			cfe_consdev = MKDEV(TTY_MAJOR, SB1250_DUART_MINOR_BASE + 1);
+#endif
+#endif
+#ifdef CONFIG_VGA_CONSOLE
+		} else if (!strcmp(consdev, "pcconsole0")) {
+			setleds("pccn");
+			cfe_consdev = MKDEV(TTY_MAJOR, 0);
+#endif
+#ifdef CONFIG_PROMICE
+		} else if (!strcmp(consdev, "promice0")) {
+			setleds("picn");
+			cfe_consdev = MKDEV(TTY_MAJOR, SB1250_PROMICE_MINOR_BASE);
+#endif
+		} else
+			return -ENODEV;
+	}
+	return 0;
+}
+
+static struct console sb1250_cfe_cons = {
+	name:		"cfe",
+	write:		cfe_console_write,
+	device:		cfe_console_device,
+	setup:		cfe_console_setup,
+	flags:		CON_PRINTBUFFER,
+	index:		-1,
+};
+
+void __init sb1250_cfe_console_init(void)
+{
+	register_console(&sb1250_cfe_cons);
+}
+
+#endif /* CONFIG_SIBYTE_CFE_CONSOLE */