--- /dev/null
+/* Copyright (C) 2011
+ * Corscience GmbH & Co. KG - Simon Schwarz <schwarz@corscience.de>
+ * - Added prep subcommand support
+ * - Reorganized source - modeled after powerpc version
+ *
+ * (C) Copyright 2002
+ * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
+ * Marius Groeger <mgroeger@sysgo.de>
+ *
+ * Copyright (C) 2001 Erik Mouw (J.A.K.Mouw@its.tudelft.nl)
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <command.h>
+#include <image.h>
+#include <u-boot/zlib.h>
+#include <asm/byteorder.h>
+#include <libfdt.h>
+#include <fdt_support.h>
+#include <asm/bootm.h>
+#include <linux/compiler.h>
+
+#if defined(CONFIG_ARMV7_NONSEC) || defined(CONFIG_ARMV7_VIRT)
+#include <asm/armv7.h>
+#endif
+
+DECLARE_GLOBAL_DATA_PTR;
+
+static struct tag *params;
+
+static ulong get_sp(void)
+{
+ ulong ret;
+
+ asm("mov %0, sp" : "=r"(ret) : );
+ return ret;
+}
+
+void arch_lmb_reserve(struct lmb *lmb)
+{
+ ulong sp;
+
+ /*
+ * Booting a (Linux) kernel image
+ *
+ * Allocate space for command line and board info - the
+ * address should be as high as possible within the reach of
+ * the kernel (see CONFIG_SYS_BOOTMAPSZ settings), but in unused
+ * memory, which means far enough below the current stack
+ * pointer.
+ */
+ sp = get_sp();
+ debug("## Current stack ends at 0x%08lx ", sp);
+
+ /* adjust sp by 4K to be safe */
+ sp -= 4096;
+ lmb_reserve(lmb, sp,
+ gd->bd->bi_dram[0].start + gd->bd->bi_dram[0].size - sp);
+}
+
+/**
+ * announce_and_cleanup() - Print message and prepare for kernel boot
+ *
+ * @fake: non-zero to do everything except actually boot
+ */
+static void announce_and_cleanup(int fake)
+{
+ printf("\nStarting kernel ...%s\n\n", fake ?
+ "(fake run for tracing)" : "");
+ bootstage_mark_name(BOOTSTAGE_ID_BOOTM_HANDOFF, "start_kernel");
+#ifdef CONFIG_BOOTSTAGE_FDT
+ bootstage_fdt_add_report();
+#endif
+#ifdef CONFIG_BOOTSTAGE_REPORT
+ bootstage_report();
+#endif
+
+#ifdef CONFIG_USB_DEVICE
+ udc_disconnect();
+#endif
+ cleanup_before_linux();
+}
+
+static void setup_start_tag (bd_t *bd)
+{
+ params = (struct tag *)bd->bi_boot_params;
+
+ params->hdr.tag = ATAG_CORE;
+ params->hdr.size = tag_size (tag_core);
+
+ params->u.core.flags = 0;
+ params->u.core.pagesize = 0;
+ params->u.core.rootdev = 0;
+
+ params = tag_next (params);
+}
+
+static void setup_memory_tags(bd_t *bd)
+{
+ int i;
+
+ for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++) {
+ params->hdr.tag = ATAG_MEM;
+ params->hdr.size = tag_size (tag_mem32);
+
+ params->u.mem.start = bd->bi_dram[i].start;
+ params->u.mem.size = bd->bi_dram[i].size;
+
+ params = tag_next (params);
+ }
+}
+
+static void setup_commandline_tag(bd_t *bd, char *commandline)
+{
+ char *p;
+
+ if (!commandline)
+ return;
+
+ /* eat leading white space */
+ for (p = commandline; *p == ' '; p++);
+
+ /* skip non-existent command lines so the kernel will still
+ * use its default command line.
+ */
+ if (*p == '\0')
+ return;
+
+ params->hdr.tag = ATAG_CMDLINE;
+ params->hdr.size =
+ (sizeof (struct tag_header) + strlen (p) + 1 + 4) >> 2;
+
+ strcpy (params->u.cmdline.cmdline, p);
+
+ params = tag_next (params);
+}
+
+static void setup_initrd_tag(bd_t *bd, ulong initrd_start, ulong initrd_end)
+{
+ /* an ATAG_INITRD node tells the kernel where the compressed
+ * ramdisk can be found. ATAG_RDIMG is a better name, actually.
+ */
+ params->hdr.tag = ATAG_INITRD2;
+ params->hdr.size = tag_size (tag_initrd);
+
+ params->u.initrd.start = initrd_start;
+ params->u.initrd.size = initrd_end - initrd_start;
+
+ params = tag_next (params);
+}
+
+static void setup_serial_tag(struct tag **tmp)
+{
+ struct tag *params = *tmp;
+ struct tag_serialnr serialnr;
+
+ get_board_serial(&serialnr);
+ params->hdr.tag = ATAG_SERIAL;
+ params->hdr.size = tag_size (tag_serialnr);
+ params->u.serialnr.low = serialnr.low;
+ params->u.serialnr.high= serialnr.high;
+ params = tag_next (params);
+ *tmp = params;
+}
+
+static void setup_revision_tag(struct tag **in_params)
+{
+ u32 rev = 0;
+
+ rev = get_board_rev();
+ params->hdr.tag = ATAG_REVISION;
+ params->hdr.size = tag_size (tag_revision);
+ params->u.revision.rev = rev;
+ params = tag_next (params);
+}
+
+static void setup_end_tag(bd_t *bd)
+{
+ params->hdr.tag = ATAG_NONE;
+ params->hdr.size = 0;
+}
+
+__weak void setup_board_tags(struct tag **in_params) {}
+
+static void do_nonsec_virt_switch(void)
+{
+#if defined(CONFIG_ARMV7_NONSEC) || defined(CONFIG_ARMV7_VIRT)
+ if (armv7_switch_nonsec() == 0)
+#ifdef CONFIG_ARMV7_VIRT
+ if (armv7_switch_hyp() == 0)
+ debug("entered HYP mode\n");
+#else
+ debug("entered non-secure state\n");
+#endif
+#endif
+
+#ifdef CONFIG_ARM64
+ smp_kick_all_cpus();
+ flush_dcache_all(); /* flush cache before swtiching to EL2 */
+ armv8_switch_to_el2();
+#ifdef CONFIG_ARMV8_SWITCH_TO_EL1
+ armv8_switch_to_el1();
+#endif
+#endif
+}
+
+/* Subcommand: PREP */
+static void boot_prep_linux(bootm_headers_t *images)
+{
+ char *commandline = getenv("bootargs");
+
+ if (IMAGE_ENABLE_OF_LIBFDT && images->ft_len) {
+#ifdef CONFIG_OF_LIBFDT
+ debug("using: FDT\n");
+ if (image_setup_linux(images)) {
+ printf("FDT creation failed! hanging...");
+ hang();
+ }
+#endif
+ } else if (BOOTM_ENABLE_TAGS) {
+ debug("using: ATAGS\n");
+ setup_start_tag(gd->bd);
+ if (BOOTM_ENABLE_SERIAL_TAG)
+ setup_serial_tag(¶ms);
+ if (BOOTM_ENABLE_CMDLINE_TAG)
+ setup_commandline_tag(gd->bd, commandline);
+ if (BOOTM_ENABLE_REVISION_TAG)
+ setup_revision_tag(¶ms);
+ if (BOOTM_ENABLE_MEMORY_TAGS)
+ setup_memory_tags(gd->bd);
+ if (BOOTM_ENABLE_INITRD_TAG) {
+ if (images->rd_start && images->rd_end) {
+ setup_initrd_tag(gd->bd, images->rd_start,
+ images->rd_end);
+ }
+ }
+ setup_board_tags(¶ms);
+ setup_end_tag(gd->bd);
+ } else {
+ printf("FDT and ATAGS support not compiled in - hanging\n");
+ hang();
+ }
+ do_nonsec_virt_switch();
+}
+
+/* Subcommand: GO */
+static void boot_jump_linux(bootm_headers_t *images, int flag)
+{
+#ifdef CONFIG_ARM64
+ void (*kernel_entry)(void *fdt_addr);
+ int fake = (flag & BOOTM_STATE_OS_FAKE_GO);
+
+ kernel_entry = (void (*)(void *fdt_addr))images->ep;
+
+ debug("## Transferring control to Linux (at address %lx)...\n",
+ (ulong) kernel_entry);
+ bootstage_mark(BOOTSTAGE_ID_RUN_OS);
+
+ announce_and_cleanup(fake);
+
+ if (!fake)
+ kernel_entry(images->ft_addr);
+#else
+ unsigned long machid = gd->bd->bi_arch_number;
+ char *s;
+ void (*kernel_entry)(int zero, int arch, uint params);
+ unsigned long r2;
+ int fake = (flag & BOOTM_STATE_OS_FAKE_GO);
+
+ kernel_entry = (void (*)(int, int, uint))images->ep;
+
+ s = getenv("machid");
+ if (s) {
+ strict_strtoul(s, 16, &machid);
+ printf("Using machid 0x%lx from environment\n", machid);
+ }
+
+ debug("## Transferring control to Linux (at address %08lx)" \
+ "...\n", (ulong) kernel_entry);
+ bootstage_mark(BOOTSTAGE_ID_RUN_OS);
+ announce_and_cleanup(fake);
+
+ if (IMAGE_ENABLE_OF_LIBFDT && images->ft_len)
+ r2 = (unsigned long)images->ft_addr;
+ else
+ r2 = gd->bd->bi_boot_params;
+
+ if (!fake)
+ kernel_entry(0, machid, r2);
+#endif
+}
+
+/* Main Entry point for arm bootm implementation
+ *
+ * Modeled after the powerpc implementation
+ * DIFFERENCE: Instead of calling prep and go at the end
+ * they are called if subcommand is equal 0.
+ */
+int do_bootm_linux(int flag, int argc, char *argv[], bootm_headers_t *images)
+{
+ /* No need for those on ARM */
+ if (flag & BOOTM_STATE_OS_BD_T || flag & BOOTM_STATE_OS_CMDLINE)
+ return -1;
+
+ if (flag & BOOTM_STATE_OS_PREP) {
+ boot_prep_linux(images);
+ return 0;
+ }
+
+ if (flag & (BOOTM_STATE_OS_GO | BOOTM_STATE_OS_FAKE_GO)) {
+ boot_jump_linux(images, flag);
+ return 0;
+ }
+
+ boot_prep_linux(images);
+ boot_jump_linux(images, flag);
+ return 0;
+}
+
+#ifdef CONFIG_CMD_BOOTZ
+
+struct zimage_header {
+ uint32_t code[9];
+ uint32_t zi_magic;
+ uint32_t zi_start;
+ uint32_t zi_end;
+};
+
+#define LINUX_ARM_ZIMAGE_MAGIC 0x016f2818
+
+int bootz_setup(ulong image, ulong *start, ulong *end)
+{
+ struct zimage_header *zi;
+
+ zi = (struct zimage_header *)map_sysmem(image, 0);
+ if (zi->zi_magic != LINUX_ARM_ZIMAGE_MAGIC) {
+ puts("Bad Linux ARM zImage magic!\n");
+ return 1;
+ }
+
+ *start = zi->zi_start;
+ *end = zi->zi_end;
+
+ printf("Kernel image @ %#08lx [ %#08lx - %#08lx ]\n", image, *start,
+ *end);
+
+ return 0;
+}
+
+#endif /* CONFIG_CMD_BOOTZ */
+
+#if defined(CONFIG_BOOTM_VXWORKS)
+void boot_prep_vxworks(bootm_headers_t *images)
+{
+#if defined(CONFIG_OF_LIBFDT)
+ int off;
+
+ if (images->ft_addr) {
+ off = fdt_path_offset(images->ft_addr, "/memory");
+ if (off < 0) {
+ if (arch_fixup_memory_node(images->ft_addr))
+ puts("## WARNING: fixup memory failed!\n");
+ }
+ }
+#endif
+ cleanup_before_linux();
+}
+void boot_jump_vxworks(bootm_headers_t *images)
+{
+ /* ARM VxWorks requires device tree physical address to be passed */
+ ((void (*)(void *))images->ep)(images->ft_addr);
+}
+#endif
Code Review / kvmfornfv.git / blobdiff