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efi_selftest: allow printing MAC addresses
Add %pm as format string to print a MAC address. This is helpful when analyzing network problems. Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de> Reviewed-by: Simon Glass <sjg@chromium.org> Signed-off-by: Alexander Graf <agraf@suse.de>
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9820c2f30c
commit
1b6332597f
1 changed files with 40 additions and 1 deletions
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@ -12,6 +12,37 @@
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struct efi_simple_text_output_protocol *con_out;
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struct efi_simple_input_interface *con_in;
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/*
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* Print a MAC address to an u16 string
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*
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* @pointer: mac address
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* @buf: pointer to buffer address
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* on return position of terminating zero word
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*/
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static void mac(void *pointer, u16 **buf)
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{
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int i, j;
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u16 c;
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u8 *p = (u8 *)pointer;
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u8 byte;
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u16 *pos = *buf;
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for (i = 0; i < ARP_HLEN; ++i) {
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if (i)
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*pos++ = ':';
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byte = p[i];
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for (j = 4; j >= 0; j -= 4) {
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c = (byte >> j) & 0x0f;
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c += '0';
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if (c > '9')
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c += 'a' - '9' - 1;
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*pos++ = c;
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}
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}
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*pos = 0;
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*buf = pos;
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}
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/*
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* Print a pointer to an u16 string
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*
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@ -146,7 +177,15 @@ void efi_st_printf(const char *fmt, ...)
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int2dec(va_arg(args, s32), &pos);
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break;
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case 'p':
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pointer(va_arg(args, void*), &pos);
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++c;
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switch (*c) {
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case 'm':
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mac(va_arg(args, void*), &pos);
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break;
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default:
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--c;
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pointer(va_arg(args, void*), &pos);
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}
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break;
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case 's':
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s = va_arg(args, const char *);
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