diff options
| author | Gordon Willem Klok <gwk@cvs.openbsd.org> | 2008-06-15 05:24:08 +0000 |
|---|---|---|
| committer | Gordon Willem Klok <gwk@cvs.openbsd.org> | 2008-06-15 05:24:08 +0000 |
| commit | fd6388fffd794075b228479299e84d73c2bdb675 (patch) | |
| tree | c44b71afbef8e5523a41c2f8ef95a6b282ef626f /sys/dev | |
| parent | 4073a6bd3160ca310267ef6209c6ab6d400683b6 (diff) | |
On AMD64 running on Intel processors with EST add support for retreiving
operating points from ACPI. In support of this add evaluation of the _PDC
object and give it the capability flags asserting OSPM management of CPU
power states.
ok marco@, canacar@
Diffstat (limited to 'sys/dev')
| -rw-r--r-- | sys/dev/acpi/acpicpu.c | 50 |
1 files changed, 49 insertions, 1 deletions
diff --git a/sys/dev/acpi/acpicpu.c b/sys/dev/acpi/acpicpu.c index b8f0034a1d3..47c275b503f 100644 --- a/sys/dev/acpi/acpicpu.c +++ b/sys/dev/acpi/acpicpu.c @@ -1,4 +1,4 @@ -/* $OpenBSD: acpicpu.c,v 1.43 2008/06/01 17:59:55 marco Exp $ */ +/* $OpenBSD: acpicpu.c,v 1.44 2008/06/15 05:24:07 gwk Exp $ */ /* * Copyright (c) 2005 Marco Peereboom <marco@openbsd.org> * @@ -47,6 +47,22 @@ void acpicpu_setperf(int); #define ACPI_STATE_C2 0x02 #define ACPI_STATE_C3 0x03 +#define ACPI_PDC_REVID 0x1 +#define ACPI_PDC_SMP 0xa +#define ACPI_PDC_MSR 0x1 + +/* _PDC Intel capabilities flags from linux */ +#define ACPI_PDC_P_FFH 0x0001 +#define ACPI_PDC_C_C1_HALT 0x0002 +#define ACPI_PDC_T_FFH 0x0004 +#define ACPI_PDC_SMP_C1PT 0x0008 +#define ACPI_PDC_SMP_C2C3 0x0010 +#define ACPI_PDC_SMP_P_SWCOORD 0x0020 +#define ACPI_PDC_SMP_C_SWCOORD 0x0040 +#define ACPI_PDC_SMP_T_SWCOORD 0x0080 +#define ACPI_PDC_C_C1_FFH 0x0100 +#define ACPI_PDC_C_C2C3_FFH 0x0200 + #define FLAGS_NO_C2 0x01 #define FLAGS_NO_C3 0x02 #define FLAGS_BMCHECK 0x04 @@ -121,6 +137,8 @@ int acpicpu_getpct(struct acpicpu_softc *); int acpicpu_getpss(struct acpicpu_softc *); struct acpi_cstate *acpicpu_add_cstate(struct acpicpu_softc *, int, int, int, int); +void acpicpu_set_pdc(struct acpicpu_softc *); + #if 0 void acpicpu_set_throttle(struct acpicpu_softc *, int); struct acpi_cstate *acpicpu_find_cstate(struct acpicpu_softc *, int); @@ -170,6 +188,28 @@ acpicpu_find_cstate(struct acpicpu_softc *sc, int type) } #endif + +void +acpicpu_set_pdc(struct acpicpu_softc *sc) { + struct aml_value cmd; + struct aml_value res; + uint32_t buf[3]; + + memset(&cmd, 0, sizeof(buf)); + cmd.type = AML_OBJTYPE_BUFFER; + cmd.v_buffer = (uint8_t *)&buf; + cmd.length = sizeof(buf); + + buf[0] = ACPI_PDC_REVID; + buf[1] = 1; + buf[2] = ACPI_PDC_C_C1_HALT | ACPI_PDC_P_FFH | ACPI_PDC_C_C1_FFH + | ACPI_PDC_C_C2C3_FFH | ACPI_PDC_SMP_P_SWCOORD | ACPI_PDC_SMP_C2C3 + | ACPI_PDC_SMP_C1PT; + + aml_evalname(sc->sc_acpi, sc->sc_devnode, "_PDC", 1, &cmd, &res); +} + + struct acpi_cstate * acpicpu_add_cstate(struct acpicpu_softc *sc, int type, int latency, int power, int address) @@ -268,6 +308,13 @@ acpicpu_attach(struct device *parent, struct device *self, void *aux) } sc->sc_duty_off = sc->sc_acpi->sc_fadt->duty_offset; sc->sc_duty_wid = sc->sc_acpi->sc_fadt->duty_width; + +#if defined(amd64) + if (strcmp(cpu_vendor, "GenuineIntel") == 0) + if (cpu_ecxfeature & CPUIDECX_EST) + acpicpu_set_pdc(sc); +#endif + if (!valid_throttle(sc->sc_duty_off, sc->sc_duty_wid, sc->sc_pblk_addr)) sc->sc_flags |= FLAGS_NOTHROTTLE; #ifdef ACPI_DEBUG @@ -298,6 +345,7 @@ acpicpu_attach(struct device *parent, struct device *self, void *aux) sc->sc_acpi->sc_fadt->p_lvl3_lat, -1, sc->sc_pblk_addr + 5); } + if (acpicpu_getpss(sc)) { sc->sc_flags |= FLAGS_NOPSS; } else { |