Blackfin: ldrinfo: new command

Simple command to decode/check an LDR image before we try to boot it.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>

README

@@ -653,6 +653,7 @@ The following options need to be configured:
 		CONFIG_CMD_ITEST	  Integer/string test of 2 values
 		CONFIG_CMD_JFFS2	* JFFS2 Support
 		CONFIG_CMD_KGDB		* kgdb
+		CONFIG_CMD_LDRINFO	  ldrinfo (display Blackfin loader)
 		CONFIG_CMD_LOADB	  loadb
 		CONFIG_CMD_LOADS	  loads
 		CONFIG_CMD_MD5SUM	  print md5 message digest

common/Makefile

@@ -105,6 +105,7 @@ COBJS-$(CONFIG_CMD_IRQ) += cmd_irq.o
 COBJS-$(CONFIG_CMD_ITEST) += cmd_itest.o
 COBJS-$(CONFIG_CMD_JFFS2) += cmd_jffs2.o
 COBJS-$(CONFIG_CMD_CRAMFS) += cmd_cramfs.o
+COBJS-$(CONFIG_CMD_LDRINFO) += cmd_ldrinfo.o
 COBJS-$(CONFIG_CMD_LICENSE) += cmd_license.o
 COBJS-y += cmd_load.o
 COBJS-$(CONFIG_LOGBUFFER) += cmd_log.o

common/cmd_ldrinfo.c

@@ -0,0 +1,192 @@
+/*
+ * U-boot - ldrinfo
+ *
+ * Copyright (c) 2010 Analog Devices Inc.
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * Licensed under the GPL-2 or later.
+ */
+
+#include <config.h>
+#include <common.h>
+#include <command.h>
+
+#include <asm/blackfin.h>
+#include <asm/mach-common/bits/bootrom.h>
+
+static uint32_t ldrinfo_header(const void *addr)
+{
+	uint32_t skip = 0;
+
+#if defined(__ADSPBF561__)
+	/* BF56x has a 4 byte global header */
+	uint32_t header, sign;
+	static const char * const spi_speed[] = {
+		"500K", "1M", "2M", "??",
+	};
+
+	memcpy(&header, addr, sizeof(header));
+
+	sign = (header & GFLAG_56X_SIGN_MASK) >> GFLAG_56X_SIGN_SHIFT;
+	printf("Header: %08X ( %s-bit-flash wait:%i hold:%i spi:%s %s)\n",
+		header,
+		(header & GFLAG_56X_16BIT_FLASH) ? "16" : "8",
+		(header & GFLAG_56X_WAIT_MASK) >> GFLAG_56X_WAIT_SHIFT,
+		(header & GFLAG_56X_HOLD_MASK) >> GFLAG_56X_HOLD_SHIFT,
+		spi_speed[(header & GFLAG_56X_SPI_MASK) >> GFLAG_56X_SPI_SHIFT],
+		sign == GFLAG_56X_SIGN_MAGIC ? "" : "!!hdrsign!! ");
+
+	skip = 4;
+#endif
+
+	    /* |Block @ 12345678: 12345678 12345678 12345678 12345678 | */
+#if defined(__ADSPBF531__) || defined(__ADSPBF532__) || defined(__ADSPBF533__) || \
+    defined(__ADSPBF534__) || defined(__ADSPBF536__) || defined(__ADSPBF537__) || \
+    defined(__ADSPBF538__) || defined(__ADSPBF539__) || defined(__ADSPBF561__)
+	printf("                  Address  Count    Flags\n");
+#else
+	printf("                  BCode    Address  Count    Argument\n");
+#endif
+
+	return skip;
+}
+
+struct ldr_flag {
+	uint16_t flag;
+	const char *desc;
+};
+
+static uint32_t ldrinfo_block(const void *base_addr)
+{
+	uint32_t count;
+
+	printf("Block @ %08X: ", (uint32_t)base_addr);
+
+#if defined(__ADSPBF531__) || defined(__ADSPBF532__) || defined(__ADSPBF533__) || \
+    defined(__ADSPBF534__) || defined(__ADSPBF536__) || defined(__ADSPBF537__) || \
+    defined(__ADSPBF538__) || defined(__ADSPBF539__) || defined(__ADSPBF561__)
+
+	uint32_t addr, pval;
+	uint16_t flags;
+	int i;
+	static const struct ldr_flag ldr_flags[] = {
+		{ BFLAG_53X_ZEROFILL,    "zerofill"  },
+		{ BFLAG_53X_RESVECT,     "resvect"   },
+		{ BFLAG_53X_INIT,        "init"      },
+		{ BFLAG_53X_IGNORE,      "ignore"    },
+		{ BFLAG_53X_COMPRESSED,  "compressed"},
+		{ BFLAG_53X_FINAL,       "final"     },
+	};
+
+	memcpy(&addr, base_addr, sizeof(addr));
+	memcpy(&count, base_addr+4, sizeof(count));
+	memcpy(&flags, base_addr+8, sizeof(flags));
+
+	printf("%08X %08X %04X ( ", addr, count, flags);
+
+	for (i = 0; i < ARRAY_SIZE(ldr_flags); ++i)
+		if (flags & ldr_flags[i].flag)
+			printf("%s ", ldr_flags[i].desc);
+
+	pval = (flags & BFLAG_53X_PFLAG_MASK) >> BFLAG_53X_PFLAG_SHIFT;
+	if (pval)
+		printf("gpio%i ", pval);
+	pval = (flags & BFLAG_53X_PPORT_MASK) >> BFLAG_53X_PPORT_SHIFT;
+	if (pval)
+		printf("port%c ", 'e' + pval);
+
+	if (flags & BFLAG_53X_ZEROFILL)
+		count = 0;
+	if (flags & BFLAG_53X_FINAL)
+		count = 0;
+	else
+		count += sizeof(addr) + sizeof(count) + sizeof(flags);
+
+#else
+
+	const uint8_t *raw8 = base_addr;
+	uint32_t bcode, addr, arg, sign, chk;
+	int i;
+	static const struct ldr_flag ldr_flags[] = {
+		{ BFLAG_SAFE,        "safe"      },
+		{ BFLAG_AUX,         "aux"       },
+		{ BFLAG_FILL,        "fill"      },
+		{ BFLAG_QUICKBOOT,   "quickboot" },
+		{ BFLAG_CALLBACK,    "callback"  },
+		{ BFLAG_INIT,        "init"      },
+		{ BFLAG_IGNORE,      "ignore"    },
+		{ BFLAG_INDIRECT,    "indirect"  },
+		{ BFLAG_FIRST,       "first"     },
+		{ BFLAG_FINAL,       "final"     },
+	};
+
+	memcpy(&bcode, base_addr, sizeof(bcode));
+	memcpy(&addr, base_addr+4, sizeof(addr));
+	memcpy(&count, base_addr+8, sizeof(count));
+	memcpy(&arg, base_addr+12, sizeof(arg));
+
+	printf("%08X %08X %08X %08X ( ", bcode, addr, count, arg);
+
+	if (addr % 4)
+		printf("!!addralgn!! ");
+	if (count % 4)
+		printf("!!cntalgn!! ");
+
+	sign = (bcode & BFLAG_HDRSIGN_MASK) >> BFLAG_HDRSIGN_SHIFT;
+	if (sign != BFLAG_HDRSIGN_MAGIC)
+		printf("!!hdrsign!! ");
+
+	chk = 0;
+	for (i = 0; i < 16; ++i)
+		chk ^= raw8[i];
+	if (chk)
+		printf("!!hdrchk!! ");
+
+	printf("dma:%i ", bcode & BFLAG_DMACODE_MASK);
+
+	for (i = 0; i < ARRAY_SIZE(ldr_flags); ++i)
+		if (bcode & ldr_flags[i].flag)
+			printf("%s ", ldr_flags[i].desc);
+
+	if (bcode & BFLAG_FILL)
+		count = 0;
+	if (bcode & BFLAG_FINAL)
+		count = 0;
+	else
+		count += sizeof(bcode) + sizeof(addr) + sizeof(count) + sizeof(arg);
+
+#endif
+
+	printf(")\n");
+
+	return count;
+}
+
+static int do_ldrinfo(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
+{
+	const void *addr;
+	uint32_t skip;
+
+	/* Get the address */
+	if (argc < 2)
+		addr = (void *)load_addr;
+	else
+		addr = (void *)simple_strtoul(argv[1], NULL, 16);
+
+	/* Walk the LDR */
+	addr += ldrinfo_header(addr);
+	do {
+		skip = ldrinfo_block(addr);
+		addr += skip;
+	} while (skip);
+
+	return 0;
+}
+
+U_BOOT_CMD(
+	ldrinfo, 2, 0, do_ldrinfo,
+	"validate ldr image in memory",
+	"[addr]\n"
+);