Vladimir Serbinenko (phcoder@gmail.com) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/5131
-gerrit
commit 3f0f51370bfee7e358d715eda9340ad652760ac0 Author: Vladimir Serbinenko phcoder@gmail.com Date: Wed Feb 5 14:23:56 2014 +0100
lynxpoint: Kill alternative cbfs_load_payload.
The only thing which this file does differently to increase the speed is usage of cache but since MTRR is covering ROM already anyway, this makes no difference and only increases maintenance efforts and cache usage.
Change-Id: I7e8a74ea1ceaa225e1024f9eb43e7280773e2b5a Signed-off-by: Vladimir Serbinenko phcoder@gmail.com --- src/southbridge/intel/lynxpoint/Makefile.inc | 1 - src/southbridge/intel/lynxpoint/spi_loading.c | 90 --------------------------- 2 files changed, 91 deletions(-)
diff --git a/src/southbridge/intel/lynxpoint/Makefile.inc b/src/southbridge/intel/lynxpoint/Makefile.inc index 7be2d03..b691e6f 100644 --- a/src/southbridge/intel/lynxpoint/Makefile.inc +++ b/src/southbridge/intel/lynxpoint/Makefile.inc @@ -41,7 +41,6 @@ ramstage-y += me_status.c ramstage-y += reset.c ramstage-y += watchdog.c ramstage-y += acpi.c -ramstage-$(CONFIG_ALT_CBFS_LOAD_PAYLOAD) += spi_loading.c
ramstage-$(CONFIG_ELOG) += elog.c ramstage-y += spi.c diff --git a/src/southbridge/intel/lynxpoint/spi_loading.c b/src/southbridge/intel/lynxpoint/spi_loading.c deleted file mode 100644 index 57e3af8..0000000 --- a/src/southbridge/intel/lynxpoint/spi_loading.c +++ /dev/null @@ -1,90 +0,0 @@ -/* - * This file is part of the coreboot project. - * - * Copyright (C) 2013 ChromeOS Authors - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; version 2 of the License. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA - */ - - -#include <stdlib.h> -#include <string.h> -#include <arch/byteorder.h> -#include <cbmem.h> -#include <cbfs.h> -#include <console/console.h> -#include <cpu/x86/smm.h> -#if CONFIG_VBOOT_VERIFY_FIRMWARE -#include <vendorcode/google/chromeos/chromeos.h> -#else -static inline void *vboot_get_payload(size_t *len) { return NULL; } -#endif - -#define CACHELINE_SIZE 64 -#define INTRA_CACHELINE_MASK (CACHELINE_SIZE - 1) -#define CACHELINE_MASK (~INTRA_CACHELINE_MASK) - -/* Mirror the payload file to the default SMM location if it is small enough. - * The default SMM region can be used since no one is using the memory at this - * location at this stage in the boot. */ -static inline void *spi_mirror(void *file_start, int file_len) -{ - int alignment_diff; - char *src; - char *dest = (void *)SMM_DEFAULT_BASE; - - alignment_diff = (INTRA_CACHELINE_MASK & (long)file_start); - - /* Adjust file length so that the start and end points are aligned to a - * cacheline. Coupled with the ROM caching in the CPU the SPI hardware - * will read and cache full length cachelines. It will also prefetch - * data as well. Once things are mirrored in memory all accesses should - * hit the CPUs cache. */ - file_len += alignment_diff; - file_len = ALIGN(file_len, CACHELINE_SIZE); - - printk(BIOS_DEBUG, "Payload aligned size: 0x%x\n", file_len); - - /* Just pass back the pointer to ROM space if the file is larger - * than the RAM mirror region. */ - if (file_len > SMM_DEFAULT_SIZE) - return file_start; - - src = (void *)(CACHELINE_MASK & (long)file_start); - /* Note that if mempcy is not using 32-bit moves the performance will - * degrade because the SPI hardware prefetchers look for - * cacheline-aligned 32-bit accesses to kick in. */ - memcpy(dest, src, file_len); - - /* Provide pointer into mirrored space. */ - return &dest[alignment_diff]; -} - -void *cbfs_load_payload(struct cbfs_media *media, const char *name) -{ - size_t file_len; - void *file_start; - - file_start = vboot_get_payload(&file_len); - - if (file_start != NULL) - return spi_mirror(file_start, file_len); - - file_start = cbfs_get_file_content(media, name, CBFS_TYPE_PAYLOAD, &file_len); - - if (file_start == NULL) - return NULL; - - return spi_mirror(file_start, file_len); -}