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-rw-r--r--arch/ppc/xmon/start.c342
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 9056fe58aaa1..000000000000
--- 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)
-{
-}
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.