From fba7eac1c84aa674696fea55ac3a37f1e7156181 Mon Sep 17 00:00:00 2001
From: Simon Glass <sjg@chromium.org>
Date: Thu, 1 Jan 2015 16:18:01 -0700
Subject: [PATCH] x86: video: Add debug option to time the BIOS copy
This can be very slow - typically 80ms even on a fast machine since it uses
the SPI flash to read the data. Add an option to display the time taken.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
---
drivers/pci/pci_rom.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/pci/pci_rom.c b/drivers/pci/pci_rom.c
index 9808bb385e..5ba315b2ad 100644
--- a/drivers/pci/pci_rom.c
+++ b/drivers/pci/pci_rom.c
@@ -156,6 +156,8 @@ int pci_rom_load(uint16_t class, struct pci_rom_header *rom_header,
target = (void *)PCI_VGA_RAM_IMAGE_START;
if (target != rom_header) {
+ ulong start = get_timer(0);
+
debug("Copying VGA ROM Image from %p to %p, 0x%x bytes\n",
rom_header, target, rom_size);
memcpy(target, rom_header, rom_size);
@@ -163,6 +165,7 @@ int pci_rom_load(uint16_t class, struct pci_rom_header *rom_header,
printf("VGA ROM copy failed\n");
return -EFAULT;
}
+ debug("Copy took %lums\n", get_timer(start));
}
*ram_headerp = target;
--
2.39.5