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![Sam bobroff](/assets/img/avatar_default.png)
The paca display is already more than 24 lines, which can be problematic if you have an old school 80x24 terminal, or more likely you are on a virtual terminal which does not scroll for whatever reason. This patch adds a new command "#", which takes a single (hex) numeric argument: lines per page. It will cause the output of "dp" and "dpa" to be broken into pages, if necessary. Sample output: 0:mon> # 10 0:mon> dp1 paca for cpu 0x1 @ c00000000fdc0480: possible = yes present = yes online = yes lock_token = 0x8000 (0x8) paca_index = 0x1 (0xa) kernel_toc = 0xc000000000eb2400 (0x10) kernelbase = 0xc000000000000000 (0x18) kernel_msr = 0xb000000000001032 (0x20) emergency_sp = 0xc00000003ffe8000 (0x28) mc_emergency_sp = 0xc00000003ffe4000 (0x2e0) in_mce = 0x0 (0x2e8) data_offset = 0x7f170000 (0x30) hw_cpu_id = 0x8 (0x38) cpu_start = 0x1 (0x3a) kexec_state = 0x0 (0x3b) [Hit a key (a:all, q:truncate, any:next page)] 0:mon> __current = 0xc00000007e696620 (0x290) kstack = 0xc00000007e6ebe30 (0x298) stab_rr = 0xb (0x2a0) saved_r1 = 0xc00000007ef37860 (0x2a8) trap_save = 0x0 (0x2b8) soft_enabled = 0x0 (0x2ba) irq_happened = 0x1 (0x2bb) io_sync = 0x0 (0x2bc) irq_work_pending = 0x0 (0x2bd) nap_state_lost = 0x0 (0x2be) 0:mon> Signed-off-by: Sam Bobroff <sam.bobroff@au1.ibm.com> [mpe: Use bool, make some variables static] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
192 lines
3.3 KiB
C
192 lines
3.3 KiB
C
/*
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* Copyright (C) 1996-2005 Paul Mackerras.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#include <linux/string.h>
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#include <asm/udbg.h>
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#include <asm/time.h>
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#include "nonstdio.h"
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static bool paginating, paginate_skipping;
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static unsigned long paginate_lpp; /* Lines Per Page */
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static unsigned long paginate_pos;
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void xmon_start_pagination(void)
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{
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paginating = true;
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paginate_skipping = false;
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paginate_pos = 0;
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}
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void xmon_end_pagination(void)
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{
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paginating = false;
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}
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void xmon_set_pagination_lpp(unsigned long lpp)
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{
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paginate_lpp = lpp;
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}
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static int xmon_readchar(void)
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{
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if (udbg_getc)
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return udbg_getc();
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return -1;
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}
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static int xmon_write(const char *ptr, int nb)
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{
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int rv = 0;
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const char *p = ptr, *q;
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const char msg[] = "[Hit a key (a:all, q:truncate, any:next page)]";
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if (nb <= 0)
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return rv;
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if (paginating && paginate_skipping)
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return nb;
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if (paginate_lpp) {
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while (paginating && (q = strchr(p, '\n'))) {
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rv += udbg_write(p, q - p + 1);
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p = q + 1;
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paginate_pos++;
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if (paginate_pos >= paginate_lpp) {
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udbg_write(msg, strlen(msg));
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switch (xmon_readchar()) {
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case 'a':
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paginating = false;
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break;
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case 'q':
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paginate_skipping = true;
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break;
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default:
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/* nothing */
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break;
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}
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paginate_pos = 0;
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udbg_write("\r\n", 2);
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if (paginate_skipping)
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return nb;
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}
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}
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}
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return rv + udbg_write(p, nb - (p - ptr));
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}
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int xmon_putchar(int c)
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{
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char ch = c;
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if (c == '\n')
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xmon_putchar('\r');
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return xmon_write(&ch, 1) == 1? c: -1;
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}
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static char line[256];
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static char *lineptr;
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static int lineleft;
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static int xmon_getchar(void)
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{
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int c;
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if (lineleft == 0) {
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lineptr = line;
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for (;;) {
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c = xmon_readchar();
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if (c == -1 || c == 4)
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break;
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if (c == '\r' || c == '\n') {
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*lineptr++ = '\n';
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xmon_putchar('\n');
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break;
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}
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switch (c) {
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case 0177:
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case '\b':
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if (lineptr > line) {
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xmon_putchar('\b');
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xmon_putchar(' ');
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xmon_putchar('\b');
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--lineptr;
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}
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break;
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case 'U' & 0x1F:
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while (lineptr > line) {
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xmon_putchar('\b');
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xmon_putchar(' ');
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xmon_putchar('\b');
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--lineptr;
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}
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break;
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default:
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if (lineptr >= &line[sizeof(line) - 1])
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xmon_putchar('\a');
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else {
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xmon_putchar(c);
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*lineptr++ = c;
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}
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}
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}
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lineleft = lineptr - line;
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lineptr = line;
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}
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if (lineleft == 0)
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return -1;
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--lineleft;
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return *lineptr++;
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}
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char *xmon_gets(char *str, int nb)
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{
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char *p;
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int c;
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for (p = str; p < str + nb - 1; ) {
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c = xmon_getchar();
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if (c == -1) {
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if (p == str)
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return NULL;
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break;
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}
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*p++ = c;
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if (c == '\n')
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break;
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}
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*p = 0;
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return str;
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}
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void xmon_printf(const char *format, ...)
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{
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va_list args;
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static char xmon_outbuf[1024];
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int rc, n;
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va_start(args, format);
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n = vsnprintf(xmon_outbuf, sizeof(xmon_outbuf), format, args);
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va_end(args);
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rc = xmon_write(xmon_outbuf, n);
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if (n && rc == 0) {
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/* No udbg hooks, fallback to printk() - dangerous */
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printk("%s", xmon_outbuf);
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}
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}
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void xmon_puts(const char *str)
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{
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xmon_write(str, strlen(str));
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}
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