setup.c
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上传日期:2013-04-10
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文件大小:9k
- /*
- * 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 CFEn");
- 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@%lxn", initrd_size, initrd_start);
- return 1;
- fail:
- printk("Bad initrd argument. Disabling initrdn");
- 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 */