diff options
Diffstat (limited to 'arch/ppc/xmon/start.c')
| -rw-r--r-- | arch/ppc/xmon/start.c | 342 |
1 files changed, 0 insertions, 342 deletions
diff --git a/arch/ppc/xmon/start.c b/arch/ppc/xmon/start.c deleted file mode 100644 index 9056fe58aaa..00000000000 --- a/arch/ppc/xmon/start.c +++ /dev/null @@ -1,342 +0,0 @@ -/* - * Copyright (C) 1996 Paul Mackerras. - */ -#include <linux/string.h> -#include <asm/machdep.h> -#include <asm/io.h> -#include <asm/page.h> -#include <linux/kernel.h> -#include <linux/errno.h> -#include <linux/sysrq.h> -#include <linux/bitops.h> -#include <asm/xmon.h> -#include <asm/errno.h> -#include <asm/processor.h> -#include <asm/delay.h> -#include <asm/btext.h> -#include <asm/ibm4xx.h> - -static volatile unsigned char *sccc, *sccd; -unsigned int TXRDY, RXRDY, DLAB; -static int xmon_expect(const char *str, unsigned int timeout); - -static int via_modem; - -#define TB_SPEED 25000000 - -static inline unsigned int readtb(void) -{ - unsigned int ret; - - asm volatile("mftb %0" : "=r" (ret) :); - return ret; -} - -void buf_access(void) -{ - if (DLAB) - sccd[3] &= ~DLAB; /* reset DLAB */ -} - - -#ifdef CONFIG_MAGIC_SYSRQ -static void sysrq_handle_xmon(int key, struct pt_regs *regs, - struct tty_struct *tty) -{ - xmon(regs); -} - -static struct sysrq_key_op sysrq_xmon_op = -{ - .handler = sysrq_handle_xmon, - .help_msg = "Xmon", - .action_msg = "Entering xmon", -}; -#endif - -void -xmon_map_scc(void) -{ -#if defined(CONFIG_405GP) - sccd = (volatile unsigned char *)0xef600300; -#elif defined(CONFIG_440EP) - sccd = (volatile unsigned char *) ioremap(PPC440EP_UART0_ADDR, 8); -#elif defined(CONFIG_440SP) - sccd = (volatile unsigned char *) ioremap64(PPC440SP_UART0_ADDR, 8); -#elif defined(CONFIG_440SPE) - sccd = (volatile unsigned char *) ioremap64(PPC440SPE_UART0_ADDR, 8); -#elif defined(CONFIG_44x) - /* This is the default for 44x platforms. Any boards that have a - different UART address need to be put in cases before this or the - port will be mapped incorrectly */ - sccd = (volatile unsigned char *) ioremap64(PPC440GP_UART0_ADDR, 8); -#endif /* platform */ - -#ifndef CONFIG_PPC_PREP - sccc = sccd + 5; - TXRDY = 0x20; - RXRDY = 1; - DLAB = 0x80; -#endif - - register_sysrq_key('x', &sysrq_xmon_op); -} - -static int scc_initialized; - -void xmon_init_scc(void); - -int -xmon_write(void *handle, void *ptr, int nb) -{ - char *p = ptr; - int i, c, ct; - -#ifdef CONFIG_SMP - static unsigned long xmon_write_lock; - int lock_wait = 1000000; - int locked; - - while ((locked = test_and_set_bit(0, &xmon_write_lock)) != 0) - if (--lock_wait == 0) - break; -#endif - - if (!scc_initialized) - xmon_init_scc(); - ct = 0; - for (i = 0; i < nb; ++i) { - while ((*sccc & TXRDY) == 0) - ; - c = p[i]; - if (c == '\n' && !ct) { - c = '\r'; - ct = 1; - --i; - } else { - ct = 0; - } - buf_access(); - *sccd = c; - eieio(); - } - -#ifdef CONFIG_SMP - if (!locked) - clear_bit(0, &xmon_write_lock); -#endif - return nb; -} - -int xmon_wants_key; - - -int -xmon_read(void *handle, void *ptr, int nb) -{ - char *p = ptr; - int i; - - if (!scc_initialized) - xmon_init_scc(); - for (i = 0; i < nb; ++i) { - while ((*sccc & RXRDY) == 0) - ; - buf_access(); - *p++ = *sccd; - } - return i; -} - -int -xmon_read_poll(void) -{ - if ((*sccc & RXRDY) == 0) { - ; - return -1; - } - buf_access(); - return *sccd; -} - -void -xmon_init_scc(void) -{ - scc_initialized = 1; - if (via_modem) { - for (;;) { - xmon_write(NULL, "ATE1V1\r", 7); - if (xmon_expect("OK", 5)) { - xmon_write(NULL, "ATA\r", 4); - if (xmon_expect("CONNECT", 40)) - break; - } - xmon_write(NULL, "+++", 3); - xmon_expect("OK", 3); - } - } -} - - -void *xmon_stdin; -void *xmon_stdout; -void *xmon_stderr; - -void -xmon_init(int arg) -{ - xmon_map_scc(); -} - -int -xmon_putc(int c, void *f) -{ - char ch = c; - - if (c == '\n') - xmon_putc('\r', f); - return xmon_write(f, &ch, 1) == 1? c: -1; -} - -int -xmon_putchar(int c) -{ - return xmon_putc(c, xmon_stdout); -} - -int -xmon_fputs(char *str, void *f) -{ - int n = strlen(str); - - return xmon_write(f, str, n) == n? 0: -1; -} - -int -xmon_readchar(void) -{ - char ch; - - for (;;) { - switch (xmon_read(xmon_stdin, &ch, 1)) { - case 1: - return ch; - case -1: - xmon_printf("read(stdin) returned -1\r\n", 0, 0); - return -1; - } - } -} - -static char line[256]; -static char *lineptr; -static int lineleft; - -int xmon_expect(const char *str, unsigned int timeout) -{ - int c; - unsigned int t0; - - timeout *= TB_SPEED; - t0 = readtb(); - do { - lineptr = line; - for (;;) { - c = xmon_read_poll(); - if (c == -1) { - if (readtb() - t0 > timeout) - return 0; - continue; - } - if (c == '\n') - break; - if (c != '\r' && lineptr < &line[sizeof(line) - 1]) - *lineptr++ = c; - } - *lineptr = 0; - } while (strstr(line, str) == NULL); - return 1; -} - -int -xmon_getchar(void) -{ - int c; - - if (lineleft == 0) { - lineptr = line; - for (;;) { - c = xmon_readchar(); - if (c == -1 || c == 4) - break; - if (c == '\r' || c == '\n') { - *lineptr++ = '\n'; - xmon_putchar('\n'); - break; - } - switch (c) { - case 0177: - case '\b': - if (lineptr > line) { - xmon_putchar('\b'); - xmon_putchar(' '); - xmon_putchar('\b'); - --lineptr; - } - break; - case 'U' & 0x1F: - while (lineptr > line) { - xmon_putchar('\b'); - xmon_putchar(' '); - xmon_putchar('\b'); - --lineptr; - } - break; - default: - if (lineptr >= &line[sizeof(line) - 1]) - xmon_putchar('\a'); - else { - xmon_putchar(c); - *lineptr++ = c; - } - } - } - lineleft = lineptr - line; - lineptr = line; - } - if (lineleft == 0) - return -1; - --lineleft; - return *lineptr++; -} - -char * -xmon_fgets(char *str, int nb, void *f) -{ - char *p; - int c; - - for (p = str; p < str + nb - 1; ) { - c = xmon_getchar(); - if (c == -1) { - if (p == str) - return NULL; - break; - } - *p++ = c; - if (c == '\n') - break; - } - *p = 0; - return str; -} - -void -xmon_enter(void) -{ -} - -void -xmon_leave(void) -{ -} |