diff options
author | Marc Jones <marcj303@gmail.com> | 2017-05-04 21:17:45 -0600 |
---|---|---|
committer | Martin Roth <martinroth@google.com> | 2017-06-26 00:45:41 +0000 |
commit | 244848462def7075e0c812a2f71c408668cacfe4 (patch) | |
tree | fde926f45d478b36eaebfd1261886c973b803857 /src/soc/amd/stoneyridge/smi_util.c | |
parent | a0199d8e1a96d94828b31f77e0a29a282871a76a (diff) | |
download | coreboot-244848462def7075e0c812a2f71c408668cacfe4.tar.xz |
soc: Add AMD Stoney Ridge southbridge code
Copy the Hudson/Kern code from southbridge/amd/pi/hudson. This
is the first of a series of patches to migrate Stoney Ridge
support from cpu, northbridge, and southbridge to soc/
Changes:
- add soc/amd/stoneyridge and soc/amd/common
- remove all other Husdon versions
- update include paths, etc
- clean up Kconfig and Makefile
- create chip.c to contain chip_ops
Change-Id: Ib88a868e654ad127be70ecc506f6b90b784f8d1b
Signed-off-by: Marc Jones <marcj303@gmail.com>
Reviewed-on: https://review.coreboot.org/19722
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Martin Roth <martinroth@google.com>
Diffstat (limited to 'src/soc/amd/stoneyridge/smi_util.c')
-rw-r--r-- | src/soc/amd/stoneyridge/smi_util.c | 78 |
1 files changed, 78 insertions, 0 deletions
diff --git a/src/soc/amd/stoneyridge/smi_util.c b/src/soc/amd/stoneyridge/smi_util.c new file mode 100644 index 0000000000..fecaf90723 --- /dev/null +++ b/src/soc/amd/stoneyridge/smi_util.c @@ -0,0 +1,78 @@ +/* + * SMM utilities used in both SMM and normal mode + * + * Copyright (C) 2014 Alexandru Gagniuc <mr.nuke.me@gmail.com> + * Subject to the GNU GPL v2, or (at your option) any later version. + */ + +#include <console/console.h> +#include <soc/smi.h> + +#define STONEYRIDGE_SMI_ACPI_COMMAND 75 + +static void configure_smi(uint8_t smi_num, uint8_t mode) +{ + uint8_t reg32_offset, bit_offset; + uint32_t reg32; + + /* SMI sources range from [0:149] */ + if (smi_num > 149) { + printk(BIOS_WARNING, "BUG: Invalid SMI: %u\n", smi_num); + return; + } + + /* 16 sources per register, 2 bits per source; registers are 4 bytes */ + reg32_offset = (smi_num / 16) * 4; + bit_offset = (smi_num % 16) * 2; + + reg32 = smi_read32(SMI_REG_CONTROL0 + reg32_offset); + reg32 &= ~(0x3 << (bit_offset)); + reg32 |= (mode & 0x3) << bit_offset; + smi_write32(SMI_REG_CONTROL0 + reg32_offset, reg32); +} + +/** + * Configure generation of interrupts for given GEVENT pin + * + * @param gevent The GEVENT pin number. Valid values are 0 thru 23 + * @param mode The type of event this pin should generate. Note that only + * SMI_MODE_SMI generates an SMI. SMI_MODE_DISABLE disables events. + * @param level SMI_LVL_LOW or SMI_LVL_HIGH + */ +void hudson_configure_gevent_smi(uint8_t gevent, uint8_t mode, uint8_t level) +{ + uint32_t reg32; + /* GEVENT pins range from [0:23] */ + if (gevent > 23) { + printk(BIOS_WARNING, "BUG: Invalid GEVENT: %u\n", gevent); + return; + } + + /* SMI0 source is GEVENT0 and so on */ + configure_smi(gevent, mode); + + /* And set set the trigger level */ + reg32 = smi_read32(SMI_REG_SMITRIG0); + reg32 &= ~(1 << gevent); + reg32 |= (level & 0x1) << gevent; + smi_write32(SMI_REG_SMITRIG0, reg32); +} + +/** Disable events from given GEVENT pin */ +void hudson_disable_gevent_smi(uint8_t gevent) +{ + /* GEVENT pins range from [0:23] */ + if (gevent > 23) { + printk(BIOS_WARNING, "BUG: Invalid GEVENT: %u\n", gevent); + return; + } + + /* SMI0 source is GEVENT0 and so on */ + configure_smi(gevent, SMI_MODE_DISABLE); +} + +/** Enable SMIs on writes to ACPI SMI command port */ +void hudson_enable_acpi_cmd_smi(void) +{ + configure_smi(STONEYRIDGE_SMI_ACPI_COMMAND, SMI_MODE_SMI); +} |