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authorGrant Likely <grant.likely@secretlab.ca>2007-02-20 09:05:00 +0100
committerStefan Roese <sr@denx.de>2007-02-20 09:05:00 +0100
commitc95c4280d751ca078c2ff58228d2f2b44ccf0600 (patch)
tree875524fdc1fde3868e34c9b003245adc079f3d3c /lib_generic
parent99b0f0fd3fbf2572ae1a7723dd90cffc8e85130a (diff)
downloadu-boot-linaro-stable-c95c4280d751ca078c2ff58228d2f2b44ccf0600.tar.gz
[PATCH 3_9] Move buffer print code from md command to common function
Printing a buffer is a darn useful thing. Move the buffer print code into print_buffer() in lib_generic/ Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Diffstat (limited to 'lib_generic')
-rw-r--r--lib_generic/display_options.c70
1 files changed, 70 insertions, 0 deletions
diff --git a/lib_generic/display_options.c b/lib_generic/display_options.c
index 512e8980d..5ddd94fd5 100644
--- a/lib_generic/display_options.c
+++ b/lib_generic/display_options.c
@@ -21,7 +21,10 @@
* MA 02111-1307 USA
*/
+#include <config.h>
#include <common.h>
+#include <linux/ctype.h>
+#include <asm/io.h>
int display_options (void)
{
@@ -65,3 +68,70 @@ void print_size (ulong size, const char *s)
}
printf (" %cB%s", c, s);
}
+
+/*
+ * Print data buffer in hex and ascii form to the terminal.
+ *
+ * data reads are buffered so that each memory address is only read once.
+ * Useful when displaying the contents of volatile registers.
+ *
+ * parameters:
+ * addr: Starting address to display at start of line
+ * data: pointer to data buffer
+ * width: data value width. May be 1, 2, or 4.
+ * count: number of values to display
+ * linelen: Number of values to print per line; specify 0 for default length
+ */
+#define MAX_LINE_LENGTH_BYTES (64)
+#define DEFAULT_LINE_LENGTH_BYTES (16)
+int print_buffer (ulong addr, void* data, uint width, uint count, uint linelen)
+{
+ uint8_t linebuf[MAX_LINE_LENGTH_BYTES];
+ uint32_t *uip = (void*)linebuf;
+ uint16_t *usp = (void*)linebuf;
+ uint8_t *ucp = (void*)linebuf;
+ int i;
+
+ if (linelen*width > MAX_LINE_LENGTH_BYTES)
+ linelen = MAX_LINE_LENGTH_BYTES / width;
+ if (linelen < 1)
+ linelen = DEFAULT_LINE_LENGTH_BYTES / width;
+
+ while (count) {
+ printf("%08lx:", addr);
+
+ /* check for overflow condition */
+ if (count < linelen)
+ linelen = count;
+
+ /* Copy from memory into linebuf and print hex values */
+ for (i = 0; i < linelen; i++) {
+ if (width == 4) {
+ uip[i] = *(volatile uint32_t *)data;
+ printf(" %08x", uip[i]);
+ } else if (width == 2) {
+ usp[i] = *(volatile uint16_t *)data;
+ printf(" %04x", usp[i]);
+ } else {
+ ucp[i] = *(volatile uint8_t *)data;
+ printf(" %02x", ucp[i]);
+ }
+ data += width;
+ }
+
+ /* Print data in ASCII characters */
+ puts(" ");
+ for (i = 0; i < linelen * width; i++)
+ putc(isprint(ucp[i]) && (ucp[i] < 0x80) ? ucp[i] : '.');
+ putc ('\n');
+
+ /* update references */
+ addr += linelen * width;
+ count -= linelen;
+
+ if (ctrlc())
+ return -1;
+ }
+
+ return 0;
+}