Blackfin: new cplbinfo command for viewing cplb tables

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

common/Makefile

@@ -41,6 +41,7 @@ COBJS-$(CONFIG_CMD_BOOTLDR) += cmd_bootldr.o
 COBJS-y += cmd_bootm.o
 COBJS-$(CONFIG_CMD_CACHE) += cmd_cache.o
 COBJS-$(CONFIG_CMD_CONSOLE) += cmd_console.o
+COBJS-$(CONFIG_CMD_CPLBINFO) += cmd_cplbinfo.o
 COBJS-$(CONFIG_CMD_DATE) += cmd_date.o
 ifdef CONFIG_4xx
 COBJS-$(CONFIG_CMD_SETGETDCR) += cmd_dcr.o

common/cmd_cplbinfo.c

+/*
+ * cmd_cplbinfo.c - dump the instruction/data cplb tables
+ *
+ * Copyright (c) 2007-2008 Analog Devices Inc.
+ *
+ * Licensed under the GPL-2 or later.
+ */
+
+#include <common.h>
+#include <command.h>
+#include <asm/blackfin.h>
+#include <asm/cplb.h>
+#include <asm/mach-common/bits/mpu.h>
+
+/*
+ * Translate the PAGE_SIZE bits into a human string
+ */
+static const char *cplb_page_size(uint32_t data)
+{
+	static const char page_size_string_table[][4] = { "1K", "4K", "1M", "4M" };
+	return page_size_string_table[(data & PAGE_SIZE_MASK) >> PAGE_SIZE_SHIFT];
+}
+
+/*
+ * show a hardware cplb table
+ */
+static void show_cplb_table(uint32_t *addr, uint32_t *data)
+{
+	size_t i;
+	printf("      Address     Data   Size  Valid  Locked\n");
+	for (i = 1; i <= 16; ++i) {
+		printf(" %2i 0x%p  0x%05X   %s     %c      %c\n",
+			i, *addr, *data,
+			cplb_page_size(*data),
+			(*data & CPLB_VALID ? 'Y' : 'N'),
+			(*data & CPLB_LOCK ? 'Y' : 'N'));
+		++addr;
+		++data;
+	}
+}
+
+/*
+ * display current instruction and data cplb tables
+ */
+int do_cplbinfo(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
+{
+	printf("%s CPLB table [%08x]:\n", "Instruction", *(uint32_t *)DMEM_CONTROL);
+	show_cplb_table((uint32_t *)ICPLB_ADDR0, (uint32_t *)ICPLB_DATA0);
+
+	printf("%s CPLB table [%08x]:\n", "Data", *(uint32_t *)IMEM_CONTROL);
+	show_cplb_table((uint32_t *)DCPLB_ADDR0, (uint32_t *)DCPLB_DATA0);
+
+	return 0;
+}
+
+U_BOOT_CMD(cplbinfo, 1, 0, do_cplbinfo,
+	"cplbinfo- display current CPLB tables\n",
+	"\n"
+	"    - display current CPLB tables\n");