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-rw-r--r--memdump/main.c153
1 files changed, 153 insertions, 0 deletions
diff --git a/memdump/main.c b/memdump/main.c
new file mode 100644
index 00000000..c8fa39d9
--- /dev/null
+++ b/memdump/main.c
@@ -0,0 +1,153 @@
+/* ----------------------------------------------------------------------- *
+ *
+ * Copyright 2007 H. Peter Anvin - All Rights Reserved
+ *
+ * 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, Inc., 53 Temple Place Ste 330,
+ * Boston MA 02111-1307, USA; either version 2 of the License, or
+ * (at your option) any later version; incorporated herein by reference.
+ *
+ * ----------------------------------------------------------------------- */
+
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include "mystuff.h"
+#include "ymsend.h"
+#include "io.h"
+
+const char *program = "memdump";
+
+void __attribute__((noreturn)) die(const char *msg)
+{
+ puts(program);
+ puts(": ");
+ puts(msg);
+ putchar('\n');
+ exit(1);
+}
+
+#ifdef DEBUG
+# define dprintf printf
+#else
+# define dprintf(...) ((void)0)
+#endif
+
+static inline __attribute__((const)) uint16_t ds(void)
+{
+ uint16_t v;
+ asm("movw %%ds,%0" : "=rm" (v));
+ return v;
+}
+
+#define GDT_ENTRY(flags,base,limit) \
+ (((uint64_t)(base & 0xff000000) << 32) | \
+ ((uint64_t)flags << 40) | \
+ ((uint64_t)(limit & 0x00ff0000) << 32) | \
+ ((uint64_t)(base & 0x00ffff00) << 16) | \
+ ((uint64_t)(limit & 0x0000ffff)))
+
+static void get_bytes(void *buf, size_t len, struct file_info *finfo,
+ size_t pos)
+{
+ size_t end;
+ static uint64_t gdt[6];
+ size_t bufl;
+
+ pos += (size_t)finfo->pvt; /* Add base */
+ end = pos+len;
+
+ if (end <= 0x100000) {
+ /* Can stay in real mode */
+ asm volatile("movw %3,%%fs ; "
+ "fs; rep; movsl ; "
+ "movw %2,%%cx ; "
+ "rep; movsb"
+ : : "D" (buf), "c" (len >> 2), "r" ((uint16_t)(len & 3)),
+ "rm" ((uint16_t)(pos >> 4)), "S" (pos & 15)
+ : "memory");
+ } else {
+ bufl = (ds() << 4)+(size_t)buf;
+ gdt[2] = GDT_ENTRY(0x0093, pos, 0xffff);
+ gdt[3] = GDT_ENTRY(0x0093, bufl, 0xffff);
+ asm volatile("pushal ; int $0x15 ; popal"
+ : : "a" (0x8700), "c" ((len+1) >> 1), "S" (&gdt)
+ : "memory");
+ }
+}
+
+static uint32_t pci_readl(int bus, int devfn, int reg)
+{
+ outl(0x80000000 | (bus << 16) | (devfn << 8) | reg, 0xcf8);
+ return inl(0xcfc);
+}
+
+int main(int argc, char *argv[])
+{
+ uint16_t bios_ports[4];
+ const char *prefix;
+ char filename[1024];
+ int i;
+ static struct serial_if sif =
+ {
+ .read = serial_read,
+ .write = serial_write,
+ };
+ struct file_info finfo;
+ const char serial_banner[] = "Now being Ymodem download...\r\n";
+
+ puts("Hello, world...\n");
+
+ printf("03:02.00 id = 0x%08x\n", pci_readl(3,2<<3,0));
+ printf("03:02.00 cmd = 0x%08x\n", pci_readl(3,2<<3,4));
+ printf("03:02.00 bar = 0x%08x\n", pci_readl(3,2<<3,0x10));
+
+ if (argc < 4)
+ die("usage: memdump port prefix start,len...");
+
+ finfo.pvt = (void *)0x400;
+ get_bytes(bios_ports, 8, &finfo, 0); /* Get BIOS serial ports */
+
+ for (i = 0; i < 4; i++)
+ printf("ttyS%i (COM%i) is at %#x\n", i, i+1, bios_ports[i]);
+
+ sif.port = strtoul(argv[1], NULL, 0);
+ if (sif.port <= 3) {
+ sif.port = bios_ports[sif.port];
+ }
+
+ if (serial_init(&sif))
+ die("failed to initialize serial port");
+
+ prefix = argv[2];
+
+ puts("Printing prefix...\n");
+ sif.write(&sif, serial_banner, sizeof serial_banner-1);
+
+ for (i = 3; i < argc; i++) {
+ uint32_t start, len;
+ char *ep;
+
+ start = strtoul(argv[i], &ep, 0);
+ if (*ep != ',')
+ die("invalid range specification");
+ len = strtoul(ep+1, NULL, 0);
+
+ sprintf(filename, "%s%#x,%#x", prefix, start, len);
+ finfo.name = filename;
+ finfo.size = len;
+ finfo.pvt = (void *)start;
+
+ puts("Sending ");
+ puts(filename);
+ puts("...\n");
+
+ send_ymodem(&sif, &finfo, get_bytes);
+ }
+
+ puts("Sending closing signature...\n");
+ end_ymodem(&sif);
+
+ return 0;
+}