[U-Boot] [PATCH 05/10] microblaze: Switch to generic bootm implementation

[Michal Simek]

There is no reason to use private code for standard bootm command.
Current implementation is also broken and don't support image relocation
properly. Switching to generic bootm implementation is fixing these issues.

cmdline and bdt bootm subcommands are returning -1 because they are not
implemented.

Similar change was done long time ago by for example commit 2bb5b638791d
("MIPS: bootm: rework and fix broken bootm code")

Signed-off-by: Michal Simek <michal.simek at xilinx.com>
---

 arch/microblaze/include/asm/config.h |   2 +
 arch/microblaze/lib/bootm.c          | 105 +++++++++++++--------------
 2 files changed, 54 insertions(+), 53 deletions(-)

diff --git a/arch/microblaze/include/asm/config.h b/arch/microblaze/include/asm/config.h
index d522669f6660..112427291526 100644
--- a/arch/microblaze/include/asm/config.h
+++ b/arch/microblaze/include/asm/config.h
@@ -12,4 +12,6 @@
 #define CONFIG_NEEDS_MANUAL_RELOC
 #endif
 
+#define CONFIG_SYS_BOOT_RAMDISK_HIGH
+
 #endif
diff --git a/arch/microblaze/lib/bootm.c b/arch/microblaze/lib/bootm.c
index a74f1d1e559c..11e534715d15 100644
--- a/arch/microblaze/lib/bootm.c
+++ b/arch/microblaze/lib/bootm.c
@@ -56,71 +56,70 @@ void arch_lmb_reserve(struct lmb *lmb)
 	}
 }
 
-int do_bootm_linux(int flag, int argc, char * const argv[],
-		   bootm_headers_t *images)
+static void boot_jump_linux(bootm_headers_t *images, int flag)
 {
-	/* First parameter is mapped to $r5 for kernel boot args */
-	void	(*thekernel) (char *, ulong, ulong);
-	char	*commandline = env_get("bootargs");
-	ulong	rd_data_start, rd_data_end;
-
-	/*
-	 * allow the PREP bootm subcommand, it is required for bootm to work
-	 */
-	if (flag & BOOTM_STATE_OS_PREP)
-		return 0;
-
-	if ((flag != 0) && (flag != BOOTM_STATE_OS_GO))
-		return 1;
-
-	int	ret;
-
-	char	*of_flat_tree = NULL;
-#if defined(CONFIG_OF_LIBFDT)
-	/* did generic code already find a device tree? */
-	if (images->ft_len)
-		of_flat_tree = images->ft_addr;
-#endif
+	void (*thekernel)(char *cmdline, ulong rd, ulong dt);
+	ulong dt = (ulong)images->ft_addr;
+	ulong rd_start = images->initrd_start;
+	ulong cmdline = images->cmdline_start;
+	int fake = (flag & BOOTM_STATE_OS_FAKE_GO);
 
 	thekernel = (void (*)(char *, ulong, ulong))images->ep;
 
-	/* find ramdisk */
-	ret = boot_get_ramdisk(argc, argv, images, IH_ARCH_MICROBLAZE,
-			&rd_data_start, &rd_data_end);
-	if (ret)
-		return 1;
-
-	bootstage_mark(BOOTSTAGE_ID_RUN_OS);
-
-	if (!of_flat_tree && argc > 1)
-		of_flat_tree = (char *)simple_strtoul(argv[1], NULL, 16);
-
-	/* fixup the initrd now that we know where it should be */
-	if (images->rd_start && images->rd_end && of_flat_tree) {
-		ret = fdt_initrd(of_flat_tree, images->rd_start,
-				 images->rd_end);
-		if (ret)
-			return 1;
-	}
-
 #ifdef DEBUG
 	printf("## Transferring control to Linux (at address 0x%08lx) ",
 	       (ulong)thekernel);
-	printf("ramdisk 0x%08lx, FDT 0x%08lx...\n",
-	       rd_data_start, (ulong) of_flat_tree);
+	printf("cmdline 0x%08lx, ramdisk 0x%08lx, FDT 0x%08lx...\n",
+	       cmdline, rd_start, dt);
 #endif
 
 #ifdef XILINX_USE_DCACHE
 	flush_cache(0, XILINX_DCACHE_BYTE_SIZE);
 #endif
-	/*
-	 * Linux Kernel Parameters (passing device tree):
-	 * r5: pointer to command line
-	 * r6: pointer to ramdisk
-	 * r7: pointer to the fdt, followed by the board info data
-	 */
-	thekernel(commandline, rd_data_start, (ulong)of_flat_tree);
-	/* does not return */
 
+	if (!fake) {
+		/*
+		 * Linux Kernel Parameters (passing device tree):
+		 * r5: pointer to command line
+		 * r6: pointer to ramdisk
+		 * r7: pointer to the fdt, followed by the board info data
+		 */
+		thekernel((char *)cmdline, rd_start, dt);
+		/* does not return */
+	}
+}
+
+static void boot_prep_linux(bootm_headers_t *images)
+{
+	if (IMAGE_ENABLE_OF_LIBFDT && images->ft_len) {
+		printf("using: FDT\n");
+		if (image_setup_linux(images)) {
+			printf("FDT creation failed! hanging...");
+			hang();
+		}
+	}
+}
+
+int do_bootm_linux(int flag, int argc, char * const argv[],
+		   bootm_headers_t *images)
+{
+	images->cmdline_start = (ulong)env_get("bootargs");
+
+	/* cmdline init is the part of 'prep' and nothing to do for 'bdt' */
+	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 1;
 }
-- 
2.17.1