patch-2.2.17 linux/arch/ppc/coffboot/chrpmain.c

• Lines: 210
• Date: Mon Sep 4 18:39:16 2000
• Orig file: v2.2.16/arch/ppc/coffboot/chrpmain.c
• Orig date: Thu Jan 1 01:00:00 1970

diff -u --recursive --new-file v2.2.16/arch/ppc/coffboot/chrpmain.c linux/arch/ppc/coffboot/chrpmain.c
@@ -0,0 +1,209 @@
+/*
+ * Copyright (C) Paul Mackerras 1997.
+ *
+ * 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.
+ */
+#include "nonstdio.h"
+#include "zlib.h"
+
+extern void *finddevice(const char *);
+extern int getprop(void *, const char *, void *, int);
+void gunzip(void *, int, unsigned char *, int *);
+void stop_imac_ethernet(void);
+void stop_imac_usb(void);
+
+#define get_16be(x)	(*(unsigned short *)(x))
+#define get_32be(x)	(*(unsigned *)(x))
+
+#define RAM_START	0x00000000
+#define RAM_END		(8<<20)
+
+#define PROG_START	0x00010000
+
+char *avail_ram;
+char *end_avail;
+
+extern char _end[];
+extern char image_data[];
+extern int image_len;
+extern char initrd_data[];
+extern int initrd_len;
+
+
+boot(int a1, int a2, void *prom)
+{
+    int ns, oh, i;
+    unsigned sa, len;
+    void *dst;
+    unsigned char *im;
+    unsigned initrd_start, initrd_size;
+    extern char _start;
+    
+    printf("chrpboot starting: loaded at 0x%x\n", &_start);
+    if (initrd_len) {
+	initrd_size = initrd_len;
+	initrd_start = (RAM_END - initrd_size) & ~0xFFF;
+	a1 = initrd_start;
+	a2 = initrd_size;
+	claim(initrd_start, RAM_END - initrd_start, 0);
+	printf("initial ramdisk moving 0x%x <- 0x%x (%x bytes)\n",
+	       initrd_start, initrd_data, initrd_size);
+	memcpy((char *)initrd_start, initrd_data, initrd_size);
+    }
+    im = image_data;
+    len = image_len;
+    /* claim 3MB starting at PROG_START */
+    claim(PROG_START, 3 << 20, 0);
+    dst = (void *) PROG_START;
+    if (im[0] == 0x1f && im[1] == 0x8b) {
+	/* claim 512kB for scratch space */
+	avail_ram = (char *) claim(0, 512 << 10, 0x10);
+	end_avail = avail_ram + (512 << 10);
+	printf("avail_ram = %x\n", avail_ram);
+	printf("gunzipping (0x%x <- 0x%x:0x%0x)...", dst, im, im+len);
+	gunzip(dst, 3 << 20, im, &len);
+	printf("done %u bytes\n", len);
+    } else {
+	memmove(dst, im, len);
+    }
+
+    flush_cache(dst, len);
+    stop_imac_ethernet();
+    stop_imac_usb();
+
+    sa = (unsigned long)PROG_START;
+    printf("start address = 0x%x\n", sa);
+
+    (*(void (*)())sa)(a1, a2, prom);
+
+    printf("returned?\n");
+
+    pause();
+}
+
+#define eieio()	asm volatile("eieio");
+
+void stop_imac_ethernet(void)
+{
+    void *macio, *enet;
+    unsigned int macio_addr[5], enet_reg[6];
+    int len;
+    volatile unsigned int *dbdma;
+
+    macio = finddevice("/pci/mac-io");
+    enet = finddevice("/pci/mac-io/ethernet");
+    if (macio == NULL || enet == NULL)
+	return;
+    len = getprop(macio, "assigned-addresses", macio_addr, sizeof(macio_addr));
+    if (len != sizeof(macio_addr))
+	return;
+    len = getprop(enet, "reg", enet_reg, sizeof(enet_reg));
+    if (len != sizeof(enet_reg))
+	return;
+    printf("macio base %x, dma at %x & %x\n",
+	   macio_addr[2], enet_reg[2], enet_reg[4]);
+
+    /* hope this is mapped... */
+    dbdma = (volatile unsigned int *) (macio_addr[2] + enet_reg[2]);
+    *dbdma = 0x80;	/* clear the RUN bit */
+    eieio();
+    dbdma = (volatile unsigned int *) (macio_addr[2] + enet_reg[4]);
+    *dbdma = 0x80;	/* clear the RUN bit */
+    eieio();
+}
+
+void stop_imac_usb(void)
+{
+    void *usb;
+    unsigned int usb_addr[5];
+    int len;
+    volatile unsigned int *usb_ctrl;
+
+    usb = finddevice("/pci/usb");
+    if (usb == NULL)
+	return;
+    len = getprop(usb, "assigned-addresses", usb_addr, sizeof(usb_addr));
+    if (len != sizeof(usb_addr))
+	return;
+    printf("usb base %x\n", usb_addr[2]);
+
+    usb_ctrl = (volatile unsigned int *) (usb_addr[2] + 8);
+    *usb_ctrl = 0x01000000;	/* cpu_to_le32(1) */
+    eieio();
+}
+
+void *zalloc(void *x, unsigned items, unsigned size)
+{
+    void *p = avail_ram;
+
+    size *= items;
+    size = (size + 7) & -8;
+    avail_ram += size;
+    if (avail_ram > end_avail) {
+	printf("oops... out of memory\n");
+	pause();
+    }
+    return p;
+}
+
+void zfree(void *x, void *addr, unsigned nb)
+{
+}
+
+#define HEAD_CRC	2
+#define EXTRA_FIELD	4
+#define ORIG_NAME	8
+#define COMMENT		0x10
+#define RESERVED	0xe0
+
+#define DEFLATED	8
+
+void gunzip(void *dst, int dstlen, unsigned char *src, int *lenp)
+{
+    z_stream s;
+    int r, i, flags;
+
+    /* skip header */
+    i = 10;
+    flags = src[3];
+    if (src[2] != DEFLATED || (flags & RESERVED) != 0) {
+	printf("bad gzipped data\n");
+	exit();
+    }
+    if ((flags & EXTRA_FIELD) != 0)
+	i = 12 + src[10] + (src[11] << 8);
+    if ((flags & ORIG_NAME) != 0)
+	while (src[i++] != 0)
+	    ;
+    if ((flags & COMMENT) != 0)
+	while (src[i++] != 0)
+	    ;
+    if ((flags & HEAD_CRC) != 0)
+	i += 2;
+    if (i >= *lenp) {
+	printf("gunzip: ran out of data in header\n");
+	exit();
+    }
+
+    s.zalloc = zalloc;
+    s.zfree = zfree;
+    r = inflateInit2(&s, -MAX_WBITS);
+    if (r != Z_OK) {
+	printf("inflateInit2 returned %d\n", r);
+	exit();
+    }
+    s.next_in = src + i;
+    s.avail_in = *lenp - i;
+    s.next_out = dst;
+    s.avail_out = dstlen;
+    r = inflate(&s, Z_FINISH);
+    if (r != Z_OK && r != Z_STREAM_END) {
+	printf("inflate returned %d msg: %s\n", r, s.msg);
+	exit();
+    }
+    *lenp = s.next_out - (unsigned char *) dst;
+    inflateEnd(&s);
+}