--- /dev/null
+/*
+ * Open Hack'Ware BIOS main.
+ *
+ * Copyright (c) 2004-2005 Jocelyn Mayer
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License V2
+ * as published by the Free Software Foundation
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+/*
+ * Status:
+ * - boots Linux 2.4 from floppy and IDE
+ * - preliminary residual data support
+ * - can find PREP boot images and Apple boot blocs
+ *
+ * TODO:
+ * 1/ Cleanify boot partitions:
+ * allow more than one boot bloc + fix PREP load again
+ * 2/ add ATAPI driver
+ * 3/ add a prompt to let the user choose its boot device / PREP image
+ * 4/ add POST
+ * 5/ add VGA driver (SVGA/VESA ?)
+ * 6/ add a user accessible setup
+ * 7/ add netboot
+ */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include "bios.h"
+
+#include "char.h"
+
+//#define DEBUG_MEMORY 1
+
+/* Version string */
+const unsigned char *BIOS_str =
+"PPC Open Hack'Ware BIOS for qemu version " BIOS_VERSION "\n";
+const unsigned char *copyright = "Copyright 2003-2005 Jocelyn Mayer\n";
+
+uint32_t isa_io_base = ISA_IO_BASE;
+
+/* Temporary hack: boots only from floppy */
+int boot_device = 'a';
+
+/* Some other PPC helper */
+/* Setup a memory mapping, using BAT0
+ * BATU:
+ * BEPI : bloc virtual address
+ * BL : area size bits (128 kB is 0, 256 1, 512 3, ...
+ * Vs/Vp
+ * BATL:
+ * BPRN : bloc real address align on 4MB boundary
+ * WIMG : cache access mode : not used
+ * PP : protection bits
+ */
+static void BAT_setup (int nr, uint32_t virtual, uint32_t physical,
+ uint32_t size, int Vs, int Vp, int PP)
+{
+ uint32_t sz_bits, tmp_sz, align, tmp;
+
+ sz_bits = 0;
+ align = 131072;
+ DPRINTF("Set BAT %d v=%0x p=%0x size=%0x\n", nr, virtual, physical, size);
+ if (size < 131072)
+ size = 131072;
+ for (tmp_sz = size / 131072; tmp_sz != 1; tmp_sz = tmp_sz >> 1) {
+ sz_bits = (sz_bits << 1) + 1;
+ align = align << 1;
+ }
+ tmp = virtual & ~(align - 1); /* Align virtual area start */
+ tmp |= sz_bits << 2; /* Fix BAT size */
+ tmp |= Vs << 1; /* Supervisor access */
+ tmp |= Vp; /* User access */
+ DPRINTF("Set BATU%d to %0x\n", nr, tmp);
+ switch (nr) {
+ case 0:
+ /* Setup IBAT0U */
+ MTSPR(528, tmp);
+ /* Setup DBAT0U */
+ MTSPR(536, tmp);
+ break;
+ case 1:
+ /* Setup DBAT1U */
+ MTSPR(538, tmp);
+ break;
+ case 2:
+ /* Setup DBAT2U */
+ MTSPR(540, tmp);
+ break;
+ }
+ tmp = physical & ~(align - 1); /* Align physical area start */
+ tmp |= 0; /* Don't care about WIMG */
+ tmp |= PP; /* Protection */
+ DPRINTF("Set BATL%d to %0x\n", nr, tmp);
+ switch (nr) {
+ case 0:
+ /* Setup IBAT0L */
+ MTSPR(529, tmp);
+ /* Setup DBAT0L */
+ MTSPR(537, tmp);
+ break;
+ case 1:
+ /* Setup DBAT1L */
+ MTSPR(539, tmp);
+ break;
+ case 2:
+ /* Setup DBAT2L */
+ MTSPR(541, tmp);
+ break;
+ }
+}
+
+typedef struct PPC_CPU_t {
+ uint32_t pvr;
+ uint32_t mask;
+ unsigned char *name;
+} PPC_CPU_t;
+
+static const PPC_CPU_t CPU_PPC[] = {
+ /* For now, know only G3 */
+ {
+ 0x00080000,
+ 0xFFFF0000,
+ "PowerPC,G3",
+ },
+ {
+ 0x00000000,
+ 0x00000000,
+ "PowerPC,generic",
+ },
+};
+
+static const unsigned char *CPU_get_name (uint32_t pvr)
+{
+ int i;
+
+ for (i = 0;; i++) {
+ if ((pvr & CPU_PPC[i].mask) == CPU_PPC[i].pvr)
+ return CPU_PPC[i].name;
+ }
+
+ return NULL;
+}
+
+#define TB_FREQ (10 * 1000 * 1000) // XXX: should calibrate
+void usleep (uint32_t usec)
+{
+#if 0 // Buggy: makes OpenDarwin crash (!)
+ uint32_t tb0[2], tb1[2], count[2];
+ uint32_t tpu;
+ int wrap = 0;
+
+ tpu = TB_FREQ / (1000 * 1000);
+ mul64(count, usec, tpu);
+ mftb(tb0);
+ add64(count, count, tb0);
+ if (count[0] < tb0[0])
+ wrap = 1;
+ while (1) {
+ mftb(tb1);
+ if (wrap == 1 && tb1[0] < tb0[0])
+ wrap = 0;
+ if (wrap == 0 &&
+ (tb1[0] > count[0] ||
+ (tb1[0] == count[0] && tb1[1] >= count[1])))
+ break;
+ tb0[0] = tb1[0];
+ }
+#else
+ uint32_t i, j;
+
+ for (i = 0; i < (usec >> 16) * 50; i++) {
+ for (j = 0; j < (usec & 0xFFFF) * 50; j++) {
+ continue;
+ }
+ }
+#endif
+}
+
+void sleep (int sec)
+{
+ int i;
+
+ for (i = 0; i < sec; i++)
+ usleep(1 * 1000 * 1000);
+}
+
+/* Stolen from Linux code */
+#define CRCPOLY_LE 0xedb88320
+
+uint32_t crc32 (uint32_t crc, const uint8_t *p, int len)
+{
+ int i;
+
+ while (len--) {
+ crc ^= *p++;
+ for (i = 0; i < 8; i++)
+ crc = (crc >> 1) ^ ((crc & 1) ? CRCPOLY_LE : 0);
+ }
+
+ return crc;
+}
+
+/* Fake write */
+int write (unused int fd, unused const char *buf, int len)
+{
+ return len;
+}
+
+/* BIOS library functions */
+/* Fake memory management (to be removed) */
+void *mem_align (unused int align)
+{
+ return malloc(0);
+}
+#if 1
+void free (unused void *p)
+{
+}
+#endif
+
+void freep (void *p)
+{
+ void **_p = p;
+
+ free(*_p);
+ *_p = NULL;
+}
+
+static inline int in_area (const void *buf,
+ const void *start, const void *end)
+{
+ return buf >= start && buf <= end;
+}
+
+#ifdef DEBUG_MEMORY
+static void *load_dest, *load_end;
+static int relax_check;
+#endif
+
+void set_loadinfo (unused void *load_base, unused uint32_t size)
+{
+#ifdef DEBUG_MEMORY
+ load_dest = load_base;
+ load_end = (char *)load_dest + size;
+#endif
+}
+
+void set_check (unused int do_it)
+{
+#ifdef DEBUG_MEMORY
+ relax_check = do_it == 0 ? 1 : 0;
+#endif
+}
+
+void check_location (unused const void *buf,
+ unused const char *func,
+ unused const char *name)
+{
+#ifdef DEBUG_MEMORY
+ if (relax_check != 0)
+ return;
+ if (!in_area(buf, &_data_start, &_data_end) &&
+ !in_area(buf, &_OF_vars_start, &_OF_vars_end) &&
+ !in_area(buf, &_sdata_start, &_sdata_end) &&
+ !in_area(buf, &_ro_start, &_ro_end) &&
+ !in_area(buf, &_RTAS_data_start, &_RTAS_data_end) &&
+ !in_area(buf, &_bss_start, &_bss_end) &&
+ !in_area(buf, &_ram_start, malloc_base) &&
+ /* Let's say 64 kB of stack is enough */
+ !in_area(buf, (void *)0x5ff0000, (void *)0x6000000) &&
+ !in_area(buf, load_dest, load_end) &&
+ /* IO area */
+ !in_area(buf, (void *)0x80000000, (void *)0x88000000)) {
+ printf("**************************************************************"
+ "**************\n");
+ printf("%s: %s: %p\n", func, name, buf);
+ printf(" data: %p %p\n", &_data_start, &_data_end);
+ printf(" OF_vars: %p %p\n", &_OF_vars_start, &_OF_vars_end);
+ printf(" sdata: %p %p\n", &_sdata_start, &_sdata_end);
+ printf(" rodata: %p %p\n", &_ro_start, &_ro_end);
+ printf(" RTAS_data: %p %p\n", &_RTAS_data_start, &_RTAS_data_end);
+ printf(" bss: %p %p\n", &_bss_start, &_bss_end);
+ printf(" mallocated: %p %p\n", &_ram_start, malloc_base);
+ printf(" stack : %p %p\n", (void *)0x5ff0000,
+ (void *)0x6000000);
+ printf(" load image: %p %p\n", load_dest, load_end);
+ printf("**************************************************************"
+ "**************\n");
+ bug();
+ }
+#endif
+}
+
+/* No overflow check here... */
+long strtol (const unsigned char *str, unsigned char **end, int base)
+{
+ long ret = 0, tmp, sign = 1;
+
+ check_location(str, __func__, "str");
+ if (base < 0 || base > 36)
+ return 0;
+ for (; *str == ' '; str++)
+ continue;
+ if (*str == '-') {
+ sign = -1;
+ str++;
+ }
+ for (;; str++) {
+ tmp = *str;
+ if (tmp < '0')
+ break;
+ if (base <= 10) {
+ if (tmp > '0' + base - 1)
+ break;
+ tmp -= '0';
+ } else {
+ if (tmp <= '9') {
+ tmp -= '0';
+ } else {
+ tmp &= ~0x20;
+ if (tmp < 'A' || tmp > 'A' + base - 11)
+ break;
+ tmp += 10 - 'A';
+ }
+ }
+ ret = (ret * base) + tmp;
+ }
+ if (sign == -1)
+ ret = -ret;
+ if (end != NULL)
+ *end = (unsigned char *)str;
+
+ return ret;
+}
+
+nvram_t *nvram;
+int arch;
+/* HACK... */
+int vga_width, vga_height, vga_depth;
+
+part_t *boot_part;
+
+/* XXX: to fix */
+void mm_init (uint32_t memsize);
+int page_descrs_init (void);
+
+int main (void)
+{
+ bloc_device_t *bd;
+ pci_host_t *pci_main;
+ void *res, *bootinfos;
+ void *boot_image, *cmdline, *ramdisk;
+ void *load_base, *load_entry, *last_alloc, *load_end;
+ uint32_t memsize, boot_image_size, cmdline_size, ramdisk_size;
+ uint32_t boot_nb;
+ int boot_device, i;
+ static const uint32_t isa_base_tab[3] = {
+ 0x80000000, /* PREP */
+ 0xFE000000, /* Grackle (Heathrow) */
+ 0xF2000000, /* UniNorth (Mac99) */
+ };
+
+ /* Retrieve NVRAM configuration */
+ for(i = 0; i < 3; i++) {
+ isa_io_base = isa_base_tab[i];
+ nvram = NVRAM_get_config(&memsize, &boot_device,
+ &boot_image, &boot_image_size,
+ &cmdline, &cmdline_size,
+ &ramdisk, &ramdisk_size);
+ if (nvram)
+ break;
+ }
+ if (i == 3) {
+ ERROR("Unable to load configuration from NVRAM. Aborting...\n");
+ return -1;
+ }
+#if 1
+ mm_init(memsize);
+#endif
+#if 1
+ page_descrs_init();
+#endif
+#ifdef USE_OPENFIRMWARE
+ OF_init();
+#endif
+ pci_main = pci_init();
+ if (pci_main == NULL)
+ ERROR("Unable to configure PCI\n");
+#ifdef USE_OPENFIRMWARE
+ /* XXX: this mess needs a serious cleanup... */
+ {
+ const unsigned char *cpu_name;
+ uint32_t pvr = mfpvr();
+
+ cpu_name = CPU_get_name(pvr);
+ OF_register_cpu(cpu_name, 0, pvr,
+ 200 * 1000 * 1000, 200 * 1000 * 1000,
+ 100 * 1000 * 1000, 100 * 1000 * 1000,
+ 0x0092);
+ }
+ OF_register_memory(memsize, 512 * 1024 /* TOFIX */);
+ /* Claim memory used by the BIOS */
+ OF_claim_virt(0x05800000, 0x00080000, NULL);
+ OF_register_bootargs(cmdline);
+#endif
+ if (isa_io_base == 0x80000000 || 1) {
+ pc_serial_register(0x3F8);
+#ifdef USE_OPENFIRMWARE
+ OF_register_bus("isa", isa_io_base, "ISA");
+ OF_register_serial("isa", "com1", 0x3F8, 4);
+ OF_register_stdio("com1", "com1");
+#endif
+ }
+#ifdef USE_OPENFIRMWARE
+ RTAS_init();
+#endif
+ /* Get a console */
+ console_open();
+ printf("%s", BIOS_str);
+ printf("Build " stringify(BUILD_DATE) " " stringify(BUILD_TIME) "\n");
+ printf("%s\n", copyright);
+ printf("Memory size: %d MB. \nBooting from device %c\n",
+ memsize >> 20, boot_device);
+ vga_puts(BIOS_str);
+ vga_puts("Build " stringify(BUILD_DATE) " " stringify(BUILD_TIME) "\n");
+ vga_puts(copyright);
+ vga_puts("\n");
+
+#if 0
+ /* QEMU is quite incoherent: d is cdrom, not second drive */
+ /* XXX: should probe CD-ROM position */
+ if (boot_device == 'd')
+ boot_device = 'e';
+#endif
+ /* Open boot device */
+ boot_part = bd_probe(boot_device);
+ if (boot_device == 'm') {
+ bd = bd_get('m');
+ if (bd == NULL) {
+ ERROR("Unable to get memory bloc device\n");
+ return -1;
+ }
+ printf("boot device: %p image %p size %d\n",
+ bd, boot_image, boot_image_size);
+ bd_ioctl(bd, MEM_SET_ADDR, boot_image);
+ bd_ioctl(bd, MEM_SET_SIZE, &boot_image_size);
+ boot_part = part_probe(bd, 1);
+ bd_put(bd);
+ printf("boot device: %p\n", bd);
+ }
+ if (boot_part == NULL) {
+ ERROR("Found no boot partition!\n");
+ return -1;
+ }
+ ERROR("Found boot partition : %p %p\n", boot_part, part_fs(boot_part));
+ mem_align(0x00001000);
+ res = malloc(0x4000);
+ last_alloc = malloc(0);
+ boot_nb = 0;
+ DPRINTF("Load base: %p - residual data: %p %p %p %p\n",
+ load_base, res, last_alloc, boot_part, part_fs(boot_part));
+ /* Load the whole boot image */
+ if (bootfile_load((void *)&load_base, (void *)&load_entry,
+ (void *)&load_end, boot_part, -1, NULL, 0) < 0) {
+ printf("Unable to load boot file\n");
+ return -1;
+ }
+#ifdef USE_OPENFIRMWARE
+ DPRINTF("Boot parameters: res: %p load_base: %p OF: %p entry: %p\n",
+ res, load_base, &OF_entry, load_entry);
+#else
+ DPRINTF("Boot parameters: res: %p load_base: %p OF: %p entry: %p\n",
+ res, load_base, NULL, load_entry);
+#endif
+ DPRINTF("Boot: %0x %0x %0x %0x\n", *(uint32_t *)load_entry,
+ *((uint32_t *)load_entry + 1),
+ *((uint32_t *)load_entry + 2),
+ *((uint32_t *)load_entry + 3));
+ /* Fill residual data structure */
+ residual_build(res, memsize, (uint32_t)load_base,
+ (uint32_t)boot_nb * part_blocsize(boot_part),
+ (uint32_t)last_alloc);
+ /* Fill bootinfos */
+ bootinfos = (void *)(((uint32_t)load_end + (1 << 20) - 1) & ~((1 << 20) - 1));
+ if (boot_image != NULL && cmdline == NULL) {
+ cmdline = bootinfos + 0x1000;
+ *(char *)cmdline = '\0';
+ }
+ set_check(0);
+ prepare_bootinfos(bootinfos, memsize, cmdline, ramdisk, ramdisk_size);
+ set_check(1);
+ if (part_flags(boot_part) & PART_PREP) {
+ vga_prep_init();
+ }
+ /* Format NVRAM */
+ NVRAM_format(nvram);
+ /* Setup MMU and boot the loaded image */
+ DPRINTF("\nSet up MMU context\n");
+ /* Map all memory with transparent mapping */
+ BAT_setup(0, 0x00000000, 0x00000000, memsize, 1, 0, 2);
+ /* Open IO ports */
+ BAT_setup(1, isa_io_base, isa_io_base, 0x00800000, 1, 1, 2);
+#if 0
+ /* Open the frame-buffer area */
+ BAT_setup(2, vga_fb_phys_addr, vga_fb_phys_addr, 0x00200000, 1, 1, 2);
+#else
+ if (pci_main != NULL) {
+ uint32_t mem_start, mem_size;
+ pci_get_mem_range(pci_main, &mem_start, &mem_size);
+ BAT_setup(2, mem_start, mem_start, mem_size, 1, 1, 2);
+ }
+#endif
+ /* Enable MMU */
+ MMU_on();
+ usleep(500);
+ dprintf("Boot: %08x %08x %08x %08x\n", *(uint32_t *)load_base,
+ *(uint32_t *)(load_base + 4), *(uint32_t *)(load_base + 8),
+ *(uint32_t *)(load_base + 12));
+ dprintf("Bootinfos at : %p\n", bootinfos);
+ printf("\nNow boot it... (%p)\n\n", malloc(0));
+ usleep(500);
+ {
+ register uint32_t r1 __asm__ ("r1");
+ printf("stack: %0x malloc_base: %p 0x05800000 0x06000000\n",
+ r1, malloc(0));
+ }
+
+ if (part_flags(boot_part) & PART_PREP) {
+ printf("PREP boot... %p %p\n", load_entry, load_base);
+ /* Hack for Linux to boot without OpenFirmware */
+ put_be32(load_base, 0xdeadc0de);
+ }
+ transfer_handler(res /* residual data */,
+ load_base /* load address */,
+#ifdef USE_OPENFIRMWARE
+ &OF_entry /* OF entry point */,
+#else
+ NULL,
+#endif
+ bootinfos /* bootinfos for Linux */,
+ cmdline /* command line for Linux */,
+ NULL /* unused for now */,
+ load_entry /* start address */,
+#if 0
+ mem_align(0x00100000) /* Stack base */
+#else
+ (void *)0x05800000
+#endif
+ );
+ /* Should never come here */
+
+ return 0;
+}
Code Review / kvmfornfv.git / blobdiff