Merge patch series "Complete decoupling of zboot logic from commands"

Simon Glass <sjg@chromium.org> says:

This series refactors the zboot code to allow it to be used with
CONFIG_COMMAND disabled.

A new zboot_run() function is used to boot a zimage.

1 files changed, 97 insertions, 0 deletions

diff --git a/arch/x86/include/asm/zimage.h b/arch/x86/include/asm/zimage.h
index 655675b6661..8b542605170 100644
--- a/arch/x86/include/asm/zimage.h
+++ b/arch/x86/include/asm/zimage.h
@@ -30,6 +30,78 @@
 #define BZIMAGE_LOAD_ADDR  0x100000
 #define ZIMAGE_LOAD_ADDR   0x10000
 
+enum {
+	ZBOOT_STATE_START	= BIT(0),
+	ZBOOT_STATE_LOAD	= BIT(1),
+	ZBOOT_STATE_SETUP	= BIT(2),
+	ZBOOT_STATE_INFO	= BIT(3),
+	ZBOOT_STATE_GO		= BIT(4),
+
+	/* This one doesn't execute automatically, so stop the count before 5 */
+	ZBOOT_STATE_DUMP	= BIT(5),
+	ZBOOT_STATE_COUNT	= 5,
+};
+
+/**
+ * struct zboot_state - Current state of the boot
+ *
+ * @bzimage_addr: Address of the bzImage to boot, or 0 if the image has already
+ *	been loaded and does not exist (as a cohesive whole) in memory
+ * @bzimage_size: Size of the bzImage, or 0 to detect this
+ * @initrd_addr: Address of the initial ramdisk, or 0 if none
+ * @initrd_size: Size of the initial ramdisk, or 0 if none
+ * @load_address: Address where the bzImage is moved before booting, either
+ *	BZIMAGE_LOAD_ADDR or ZIMAGE_LOAD_ADDR
+ *	This is set up when loading the zimage
+ * @base_ptr: Pointer to the boot parameters, typically at address
+ *	DEFAULT_SETUP_BASE
+ *	This is set up when loading the zimage
+ * @cmdline: Environment variable containing the 'override' command line, or
+ *	NULL to use the one in the setup block
+ */
+struct zboot_state {
+	ulong bzimage_addr;
+	ulong bzimage_size;
+	ulong initrd_addr;
+	ulong initrd_size;
+	ulong load_address;
+	struct boot_params *base_ptr;
+	const char *cmdline;
+};
+
+extern struct zboot_state state;
+
+/**
+ * zimage_dump() - Dump information about a zimage
+ *
+ * @base_ptr: Pointer to the boot parameters
+ * @show_cmdline: true to show the kernel command line
+ */
+void zimage_dump(struct boot_params *base_ptr, bool show_cmdline);
+
+/**
+ * zboot_load() - Load a zimage
+ *
+ * Load the zimage into the correct place
+ *
+ * Return: 0 if OK, -ve on error
+ */
+int zboot_load(void);
+
+/**
+ * zboot_setup() - Set up the zboot image reeady for booting
+ *
+ * Return: 0 if OK, -ve on error
+ */
+int zboot_setup(void);
+
+/**
+ * zboot_go() - Start the image
+ *
+ * Return: 0 if OK, -ve on error
+ */
+int zboot_go(void);
+
 /**
  * load_zimage() - Load a zImage or bzImage
  *
@@ -62,4 +134,29 @@ struct boot_params *load_zimage(char *image, unsigned long kernel_size,
 int setup_zimage(struct boot_params *setup_base, char *cmd_line, int auto_boot,
 		 ulong initrd_addr, ulong initrd_size, ulong cmdline_force);
 
+/**
+ * zboot_start() - Prepare to boot a zimage
+ *
+ * Record information about a zimage so it can be booted
+ *
+ * @bzimage_addr: Address of the bzImage to boot
+ * @bzimage_size: Size of the bzImage, or 0 to detect this
+ * @initrd_addr: Address of the initial ramdisk, or 0 if none
+ * @initrd_size: Size of the initial ramdisk, or 0 if none
+ * @base_addr: If non-zero, this indicates that the boot parameters have already
+ *	been loaded by the caller to this address, so the load_zimage() call
+ *	in zboot_load() will be skipped when booting
+ * @cmdline: Environment variable containing the 'override' command line, or
+ *	NULL to use the one in the setup block
+ */
+void zboot_start(ulong bzimage_addr, ulong bzimage_size, ulong initrd_addr,
+		 ulong initrd_size, ulong base_addr, const char *cmdline);
+
+/**
+ * zboot_info() - Show simple info about a zimage
+ *
+ * Shows wherer the kernel was loaded and also the setup base
+ */
+void zboot_info(void);
+
 #endif