Initial import of qemu-2.4.1HEADmaster

1 files changed, 375 insertions, 0 deletions

diff --git a/roms/u-boot/arch/x86/lib/zimage.c b/roms/u-boot/arch/x86/lib/zimage.c
new file mode 100644
index 00000000..1dab3cc7
--- /dev/null
+++ b/roms/u-boot/arch/x86/lib/zimage.c
@@ -0,0 +1,375 @@
+/*
+ * Copyright (c) 2011 The Chromium OS Authors.
+ * (C) Copyright 2002
+ * Daniel Engström, Omicron Ceti AB, <daniel@omicron.se>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+/*
+ * Linux x86 zImage and bzImage loading
+ *
+ * based on the procdure described in
+ * linux/Documentation/i386/boot.txt
+ */
+
+#include <common.h>
+#include <asm/io.h>
+#include <asm/ptrace.h>
+#include <asm/zimage.h>
+#include <asm/byteorder.h>
+#include <asm/bootparam.h>
+#ifdef CONFIG_SYS_COREBOOT
+#include <asm/arch/timestamp.h>
+#endif
+#include <linux/compiler.h>
+
+/*
+ * Memory lay-out:
+ *
+ * relative to setup_base (which is 0x90000 currently)
+ *
+ *	0x0000-0x7FFF	Real mode kernel
+ *	0x8000-0x8FFF	Stack and heap
+ *	0x9000-0x90FF	Kernel command line
+ */
+#define DEFAULT_SETUP_BASE	0x90000
+#define COMMAND_LINE_OFFSET	0x9000
+#define HEAP_END_OFFSET		0x8e00
+
+#define COMMAND_LINE_SIZE	2048
+
+unsigned generic_install_e820_map(unsigned max_entries,
+				  struct e820entry *entries)
+{
+	return 0;
+}
+
+unsigned install_e820_map(unsigned max_entries,
+			  struct e820entry *entries)
+	__attribute__((weak, alias("generic_install_e820_map")));
+
+static void build_command_line(char *command_line, int auto_boot)
+{
+	char *env_command_line;
+
+	command_line[0] = '\0';
+
+	env_command_line =  getenv("bootargs");
+
+	/* set console= argument if we use a serial console */
+	if (!strstr(env_command_line, "console=")) {
+		if (!strcmp(getenv("stdout"), "serial")) {
+
+			/* We seem to use serial console */
+			sprintf(command_line, "console=ttyS0,%s ",
+				getenv("baudrate"));
+		}
+	}
+
+	if (auto_boot)
+		strcat(command_line, "auto ");
+
+	if (env_command_line)
+		strcat(command_line, env_command_line);
+
+	printf("Kernel command line: \"%s\"\n", command_line);
+}
+
+static int kernel_magic_ok(struct setup_header *hdr)
+{
+	if (KERNEL_MAGIC != hdr->boot_flag) {
+		printf("Error: Invalid Boot Flag "
+			"(found 0x%04x, expected 0x%04x)\n",
+			hdr->boot_flag, KERNEL_MAGIC);
+		return 0;
+	} else {
+		printf("Valid Boot Flag\n");
+		return 1;
+	}
+}
+
+static int get_boot_protocol(struct setup_header *hdr)
+{
+	if (hdr->header == KERNEL_V2_MAGIC) {
+		printf("Magic signature found\n");
+		return hdr->version;
+	} else {
+		/* Very old kernel */
+		printf("Magic signature not found\n");
+		return 0x0100;
+	}
+}
+
+struct boot_params *load_zimage(char *image, unsigned long kernel_size,
+				void **load_address)
+{
+	struct boot_params *setup_base;
+	int setup_size;
+	int bootproto;
+	int big_image;
+
+	struct boot_params *params = (struct boot_params *)image;
+	struct setup_header *hdr = &params->hdr;
+
+	/* base address for real-mode segment */
+	setup_base = (struct boot_params *)DEFAULT_SETUP_BASE;
+
+	if (!kernel_magic_ok(hdr))
+		return 0;
+
+	/* determine size of setup */
+	if (0 == hdr->setup_sects) {
+		printf("Setup Sectors = 0 (defaulting to 4)\n");
+		setup_size = 5 * 512;
+	} else {
+		setup_size = (hdr->setup_sects + 1) * 512;
+	}
+
+	printf("Setup Size = 0x%8.8lx\n", (ulong)setup_size);
+
+	if (setup_size > SETUP_MAX_SIZE)
+		printf("Error: Setup is too large (%d bytes)\n", setup_size);
+
+	/* determine boot protocol version */
+	bootproto = get_boot_protocol(hdr);
+
+	printf("Using boot protocol version %x.%02x\n",
+	       (bootproto & 0xff00) >> 8, bootproto & 0xff);
+
+	if (bootproto >= 0x0200) {
+		if (hdr->setup_sects >= 15) {
+			printf("Linux kernel version %s\n",
+				(char *)params +
+				hdr->kernel_version + 0x200);
+		} else {
+			printf("Setup Sectors < 15 - "
+				"Cannot print kernel version.\n");
+		}
+	}
+
+	/* Determine image type */
+	big_image = (bootproto >= 0x0200) &&
+		    (hdr->loadflags & BIG_KERNEL_FLAG);
+
+	/* Determine load address */
+	if (big_image)
+		*load_address = (void *)BZIMAGE_LOAD_ADDR;
+	else
+		*load_address = (void *)ZIMAGE_LOAD_ADDR;
+
+	printf("Building boot_params at 0x%8.8lx\n", (ulong)setup_base);
+	memset(setup_base, 0, sizeof(*setup_base));
+	setup_base->hdr = params->hdr;
+
+	if (bootproto >= 0x0204)
+		kernel_size = hdr->syssize * 16;
+	else
+		kernel_size -= setup_size;
+
+	if (bootproto == 0x0100) {
+		/*
+		 * A very old kernel MUST have its real-mode code
+		 * loaded at 0x90000
+		 */
+		if ((u32)setup_base != 0x90000) {
+			/* Copy the real-mode kernel */
+			memmove((void *)0x90000, setup_base, setup_size);
+
+			/* Copy the command line */
+			memmove((void *)0x99000,
+				(u8 *)setup_base + COMMAND_LINE_OFFSET,
+				COMMAND_LINE_SIZE);
+
+			 /* Relocated */
+			setup_base = (struct boot_params *)0x90000;
+		}
+
+		/* It is recommended to clear memory up to the 32K mark */
+		memset((u8 *)0x90000 + setup_size, 0,
+		       SETUP_MAX_SIZE - setup_size);
+	}
+
+	if (big_image) {
+		if (kernel_size > BZIMAGE_MAX_SIZE) {
+			printf("Error: bzImage kernel too big! "
+				"(size: %ld, max: %d)\n",
+				kernel_size, BZIMAGE_MAX_SIZE);
+			return 0;
+		}
+	} else if ((kernel_size) > ZIMAGE_MAX_SIZE) {
+		printf("Error: zImage kernel too big! (size: %ld, max: %d)\n",
+		       kernel_size, ZIMAGE_MAX_SIZE);
+		return 0;
+	}
+
+	printf("Loading %s at address %p (%ld bytes)\n",
+		big_image ? "bzImage" : "zImage", *load_address, kernel_size);
+
+	memmove(*load_address, image + setup_size, kernel_size);
+
+	return setup_base;
+}
+
+int setup_zimage(struct boot_params *setup_base, char *cmd_line, int auto_boot,
+		 unsigned long initrd_addr, unsigned long initrd_size)
+{
+	struct setup_header *hdr = &setup_base->hdr;
+	int bootproto = get_boot_protocol(hdr);
+
+	setup_base->e820_entries = install_e820_map(
+		ARRAY_SIZE(setup_base->e820_map), setup_base->e820_map);
+
+	if (bootproto == 0x0100) {
+		setup_base->screen_info.cl_magic = COMMAND_LINE_MAGIC;
+		setup_base->screen_info.cl_offset = COMMAND_LINE_OFFSET;
+	}
+	if (bootproto >= 0x0200) {
+		hdr->type_of_loader = 8;
+
+		if (initrd_addr) {
+			printf("Initial RAM disk at linear address "
+			       "0x%08lx, size %ld bytes\n",
+			       initrd_addr, initrd_size);
+
+			hdr->ramdisk_image = initrd_addr;
+			hdr->ramdisk_size = initrd_size;
+		}
+	}
+
+	if (bootproto >= 0x0201) {
+		hdr->heap_end_ptr = HEAP_END_OFFSET;
+		hdr->loadflags |= HEAP_FLAG;
+	}
+
+	if (bootproto >= 0x0202) {
+		hdr->cmd_line_ptr = (uintptr_t)cmd_line;
+	} else if (bootproto >= 0x0200) {
+		setup_base->screen_info.cl_magic = COMMAND_LINE_MAGIC;
+		setup_base->screen_info.cl_offset =
+			(uintptr_t)cmd_line - (uintptr_t)setup_base;
+
+		hdr->setup_move_size = 0x9100;
+	}
+
+	/* build command line at COMMAND_LINE_OFFSET */
+	build_command_line(cmd_line, auto_boot);
+	return 0;
+}
+
+/*
+ * Implement a weak default function for boards that optionally
+ * need to clean up the system before jumping to the kernel.
+ */
+__weak void board_final_cleanup(void)
+{
+}
+
+void boot_zimage(void *setup_base, void *load_address)
+{
+	debug("## Transferring control to Linux (at address %08x) ...\n",
+	      (u32)setup_base);
+
+	bootstage_mark_name(BOOTSTAGE_ID_BOOTM_HANDOFF, "start_kernel");
+#ifdef CONFIG_BOOTSTAGE_REPORT
+	bootstage_report();
+#endif
+	board_final_cleanup();
+
+	printf("\nStarting kernel ...\n\n");
+
+#ifdef CONFIG_SYS_COREBOOT
+	timestamp_add_now(TS_U_BOOT_START_KERNEL);
+#endif
+	/*
+	 * Set %ebx, %ebp, and %edi to 0, %esi to point to the boot_params
+	 * structure, and then jump to the kernel. We assume that %cs is
+	 * 0x10, 4GB flat, and read/execute, and the data segments are 0x18,
+	 * 4GB flat, and read/write. U-boot is setting them up that way for
+	 * itself in arch/i386/cpu/cpu.c.
+	 */
+	__asm__ __volatile__ (
+	"movl $0, %%ebp\n"
+	"cli\n"
+	"jmp *%[kernel_entry]\n"
+	:: [kernel_entry]"a"(load_address),
+	   [boot_params] "S"(setup_base),
+	   "b"(0), "D"(0)
+	:  "%ebp"
+	);
+}
+
+void setup_pcat_compatibility(void)
+	__attribute__((weak, alias("__setup_pcat_compatibility")));
+
+void __setup_pcat_compatibility(void)
+{
+}
+
+int do_zboot(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[])
+{
+	struct boot_params *base_ptr;
+	void *bzImage_addr = NULL;
+	void *load_address;
+	char *s;
+	ulong bzImage_size = 0;
+	ulong initrd_addr = 0;
+	ulong initrd_size = 0;
+
+	disable_interrupts();
+
+	/* Setup board for maximum PC/AT Compatibility */
+	setup_pcat_compatibility();
+
+	if (argc >= 2) {
+		/* argv[1] holds the address of the bzImage */
+		s = argv[1];
+	} else {
+		s = getenv("fileaddr");
+	}
+
+	if (s)
+		bzImage_addr = (void *)simple_strtoul(s, NULL, 16);
+
+	if (argc >= 3) {
+		/* argv[2] holds the size of the bzImage */
+		bzImage_size = simple_strtoul(argv[2], NULL, 16);
+	}
+
+	if (argc >= 4)
+		initrd_addr = simple_strtoul(argv[3], NULL, 16);
+	if (argc >= 5)
+		initrd_size = simple_strtoul(argv[4], NULL, 16);
+
+	/* Lets look for */
+	base_ptr = load_zimage(bzImage_addr, bzImage_size, &load_address);
+
+	if (!base_ptr) {
+		printf("## Kernel loading failed ...\n");
+		return -1;
+	}
+	if (setup_zimage(base_ptr, (char *)base_ptr + COMMAND_LINE_OFFSET,
+			0, initrd_addr, initrd_size)) {
+		printf("Setting up boot parameters failed ...\n");
+		return -1;
+	}
+
+	/* we assume that the kernel is in place */
+	boot_zimage(base_ptr, load_address);
+	/* does not return */
+
+	return -1;
+}
+
+U_BOOT_CMD(
+	zboot, 5, 0,	do_zboot,
+	"Boot bzImage",
+	"[addr] [size] [initrd addr] [initrd size]\n"
+	"      addr -        The optional starting address of the bzimage.\n"
+	"                    If not set it defaults to the environment\n"
+	"                    variable \"fileaddr\".\n"
+	"      size -        The optional size of the bzimage. Defaults to\n"
+	"                    zero.\n"
+	"      initrd addr - The address of the initrd image to use, if any.\n"
+	"      initrd size - The size of the initrd image to use, if any.\n"
+);