diff options
| author | Furquan Shaikh <furquan@google.com> | 2016-07-30 18:06:23 -0700 |
|---|---|---|
| committer | Aaron Durbin <adurbin@chromium.org> | 2016-08-02 18:38:04 +0200 |
| commit | 8d66bee7beddfefcd493b232ff832f6d3053f9a5 (patch) | |
| tree | 5dcad7f4f2782b7ef4a46fde6b02f8c0f8a7105b | |
| parent | 5e61233fc107f938f11b9db00aed23f99c6ae9ba (diff) | |
intel/apollolake: Enable upper CMOS bank in bootblock
Upper CMOS bank is used to store the boot count. It is important to
enable it as soon as possible in bootblock.
BUG=chrome-os-partner:55473
Change-Id: I7c4f49c337c2e24a93c1e71466e2f66db04be562
Signed-off-by: Furquan Shaikh <furquan@google.com>
Reviewed-on: https://review.coreboot.org/15998
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
| -rw-r--r-- | src/soc/intel/apollolake/bootblock/bootblock.c | 10 | ||||
| -rw-r--r-- | src/soc/intel/apollolake/include/soc/iosf.h | 4 |
2 files changed, 14 insertions, 0 deletions
diff --git a/src/soc/intel/apollolake/bootblock/bootblock.c b/src/soc/intel/apollolake/bootblock/bootblock.c index 31144ff219..3015d17079 100644 --- a/src/soc/intel/apollolake/bootblock/bootblock.c +++ b/src/soc/intel/apollolake/bootblock/bootblock.c @@ -22,6 +22,7 @@ #include <soc/iomap.h> #include <soc/cpu.h> #include <soc/gpio.h> +#include <soc/iosf.h> #include <soc/mmap_boot.h> #include <soc/northbridge.h> #include <soc/pci_devs.h> @@ -56,6 +57,13 @@ static void enable_pm_timer(void) wrmsr(MSR_EMULATE_PM_TMR, msr); } +static void enable_cmos_upper_bank(void) +{ + uint32_t reg = iosf_read(IOSF_RTC_PORT_ID, RTC_CONFIG); + reg |= RTC_CONFIG_UCMOS_ENABLE; + iosf_write(IOSF_RTC_PORT_ID, RTC_CONFIG, reg); +} + void asmlinkage bootblock_c_entry(uint64_t base_timestamp) { device_t dev = NB_DEV_ROOT; @@ -82,6 +90,8 @@ void asmlinkage bootblock_c_entry(uint64_t base_timestamp) pci_write_config16(dev, PCI_COMMAND, PCI_COMMAND_IO | PCI_COMMAND_MASTER); + enable_cmos_upper_bank(); + /* Call lib/bootblock.c main */ bootblock_main_with_timestamp(base_timestamp); } diff --git a/src/soc/intel/apollolake/include/soc/iosf.h b/src/soc/intel/apollolake/include/soc/iosf.h index eeb93306cd..ae3e8ec88a 100644 --- a/src/soc/intel/apollolake/include/soc/iosf.h +++ b/src/soc/intel/apollolake/include/soc/iosf.h @@ -20,6 +20,10 @@ #include <arch/io.h> +#define IOSF_RTC_PORT_ID 0xD1 +#define RTC_CONFIG 0x3400 +#define RTC_CONFIG_UCMOS_ENABLE (1 << 2) + inline static void iosf_write(uint16_t port, uint16_t reg, uint32_t val) { uintptr_t base = CONFIG_IOSF_BASE_ADDRESS | (port << 16) | (reg & ~3); |