diff options
Diffstat (limited to 'src/drivers/pc80/mc146818rtc.c')
| -rw-r--r-- | src/drivers/pc80/mc146818rtc.c | 25 |
1 files changed, 23 insertions, 2 deletions
diff --git a/src/drivers/pc80/mc146818rtc.c b/src/drivers/pc80/mc146818rtc.c index 0c95265c61..6c39f812b9 100644 --- a/src/drivers/pc80/mc146818rtc.c +++ b/src/drivers/pc80/mc146818rtc.c @@ -2,6 +2,7 @@ * This file is part of the coreboot project. * * Copyright 2014 The Chromium OS Authors. All rights reserved. + * Copyright (C) 2015 Timothy Pearson <tpearson@raptorengineeringinc.com>, Raptor Engineering * * 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 @@ -33,6 +34,16 @@ #define LB_CKS_LOC 0 #endif +#include <smp/spinlock.h> + +#if (defined(__PRE_RAM__) && \ +IS_ENABLED(CONFIG_HAVE_ROMSTAGE_NVRAM_CBFS_SPINLOCK)) + #define LOCK_NVRAM_CBFS_SPINLOCK spin_lock(romstage_nvram_cbfs_lock()); + #define UNLOCK_NVRAM_CBFS_SPINLOCK spin_unlock(romstage_nvram_cbfs_lock()); +#else + #define LOCK_NVRAM_CBFS_SPINLOCK + #define UNLOCK_NVRAM_CBFS_SPINLOCK +#endif static void cmos_reset_date(void) { @@ -204,6 +215,8 @@ enum cb_err get_option(void *dest, const char *name) if (!IS_ENABLED(CONFIG_USE_OPTION_TABLE)) return CB_CMOS_OTABLE_DISABLED; + LOCK_NVRAM_CBFS_SPINLOCK + /* Figure out how long name is */ namelen = strnlen(name, CMOS_MAX_NAME_LENGTH); @@ -213,6 +226,8 @@ enum cb_err get_option(void *dest, const char *name) if (!ct) { printk(BIOS_ERR, "RTC: cmos_layout.bin could not be found. " "Options are disabled\n"); + + UNLOCK_NVRAM_CBFS_SPINLOCK return CB_CMOS_LAYOUT_NOT_FOUND; } ce = (struct cmos_entries*)((unsigned char *)ct + ct->header_length); @@ -225,13 +240,19 @@ enum cb_err get_option(void *dest, const char *name) } if (!found) { printk(BIOS_DEBUG, "WARNING: No CMOS option '%s'.\n", name); + UNLOCK_NVRAM_CBFS_SPINLOCK return CB_CMOS_OPTION_NOT_FOUND; } - if (get_cmos_value(ce->bit, ce->length, dest) != CB_SUCCESS) + if (get_cmos_value(ce->bit, ce->length, dest) != CB_SUCCESS) { + UNLOCK_NVRAM_CBFS_SPINLOCK return CB_CMOS_ACCESS_ERROR; - if (!cmos_checksum_valid(LB_CKS_RANGE_START, LB_CKS_RANGE_END, LB_CKS_LOC)) + } + if (!cmos_checksum_valid(LB_CKS_RANGE_START, LB_CKS_RANGE_END, LB_CKS_LOC)) { + UNLOCK_NVRAM_CBFS_SPINLOCK return CB_CMOS_CHECKSUM_INVALID; + } + UNLOCK_NVRAM_CBFS_SPINLOCK return CB_SUCCESS; } |