+// SPDX-License-Identifier: GPL-2.0+
/*
* (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 <dm/device.h>
+#include <dm/root.h>
+#include <errno.h>
#include <fdt_support.h>
#include <image.h>
#include <u-boot/zlib.h>
#include <asm/bootparam.h>
+#include <asm/cpu.h>
#include <asm/byteorder.h>
#include <asm/zimage.h>
#ifdef CONFIG_SYS_COREBOOT
#include <asm/arch/timestamp.h>
#endif
-#define COMMAND_LINE_OFFSET 0x9000
+DECLARE_GLOBAL_DATA_PTR;
-/*
- * 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)
-{
-}
+#define COMMAND_LINE_OFFSET 0x9000
void bootm_announce_and_cleanup(void)
{
#ifdef CONFIG_BOOTSTAGE_REPORT
bootstage_report();
#endif
- board_final_cleanup();
+
+ /*
+ * Call remove function of all devices with a removal flag set.
+ * This may be useful for last-stage operations, like cancelling
+ * of DMA operation or releasing device internal buffers.
+ */
+ dm_remove_devices_flags(DM_REMOVE_ACTIVE_ALL);
}
#if defined(CONFIG_OF_LIBFDT) && !defined(CONFIG_OF_NO_KERNEL)
}
if (is_zimage) {
- void *load_address;
+ ulong load_address;
char *base_ptr;
base_ptr = (char *)load_zimage(data, len, &load_address);
- images->os.load = (ulong)load_address;
+ images->os.load = load_address;
cmd_line_dest = base_ptr + COMMAND_LINE_OFFSET;
images->ep = (ulong)base_ptr;
} else if (images->ep) {
cmd_line_dest = (void *)images->ep + COMMAND_LINE_OFFSET;
} else {
- printf("## Kernel loading failed (no setup) ...\n");
+ printf("## Kernel loading failed (missing x86 kernel setup) ...\n");
goto error;
}
return 1;
}
+int boot_linux_kernel(ulong setup_base, ulong load_address, bool image_64bit)
+{
+ bootm_announce_and_cleanup();
+
+#ifdef CONFIG_SYS_COREBOOT
+ timestamp_add_now(TS_U_BOOT_START_KERNEL);
+#endif
+ if (image_64bit) {
+ if (!cpu_has_64bit()) {
+ puts("Cannot boot 64-bit kernel on 32-bit machine\n");
+ return -EFAULT;
+ }
+ /* At present 64-bit U-Boot does not support booting a
+ * kernel.
+ * TODO(sjg@chromium.org): Support booting both 32-bit and
+ * 64-bit kernels from 64-bit U-Boot.
+ */
+#if !CONFIG_IS_ENABLED(X86_64)
+ return cpu_jump_to_64bit(setup_base, load_address);
+#endif
+ } else {
+ /*
+ * 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.
+ *
+ * Note that we cannot currently boot a kernel while running as
+ * an EFI application. Please use the payload option for that.
+ */
+#ifndef CONFIG_EFI_APP
+ __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)
+ );
+#endif
+ }
+
+ /* We can't get to here */
+ return -EFAULT;
+}
+
/* Subcommand: GO */
static int boot_jump_linux(bootm_headers_t *images)
{
debug("## Transferring control to Linux (at address %08lx, kernel %08lx) ...\n",
images->ep, images->os.load);
- boot_zimage((struct boot_params *)images->ep, (void *)images->os.load);
- /* does not return */
-
- return 1;
+ return boot_linux_kernel(images->ep, images->os.load,
+ images->os.arch == IH_ARCH_X86_64);
}
int do_bootm_linux(int flag, int argc, char * const argv[],
if (flag & BOOTM_STATE_OS_PREP)
return boot_prep_linux(images);
- if (flag & BOOTM_STATE_OS_GO) {
- boot_jump_linux(images);
- return 0;
- }
+ if (flag & BOOTM_STATE_OS_GO)
+ return boot_jump_linux(images);
return boot_jump_linux(images);
}