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author | njl <njl@FreeBSD.org> | 2006-06-04 08:04:19 +0000 |
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committer | njl <njl@FreeBSD.org> | 2006-06-04 08:04:19 +0000 |
commit | 058d883877b9a4a294fadd2a6d4f66eeb3932378 (patch) | |
tree | 1d8e583fd15477a0e256d015e460056ee7e04550 | |
parent | fe27631048e7aa34e4fdb2b3f660ffc310e2264d (diff) | |
download | FreeBSD-src-058d883877b9a4a294fadd2a6d4f66eeb3932378.zip FreeBSD-src-058d883877b9a4a294fadd2a6d4f66eeb3932378.tar.gz |
Clean up many of the debugging messages and move them under bootverbose.
Move the code for printing timer statistics into a test function instead of
an ifdef (accessible via the debug.acpi.hpet_test tunable). Also use defines
for register offsets instead of magic values.
Courtesy of: slow flight to HK
-rw-r--r-- | sys/dev/acpica/acpi_hpet.c | 138 |
1 files changed, 74 insertions, 64 deletions
diff --git a/sys/dev/acpica/acpi_hpet.c b/sys/dev/acpica/acpi_hpet.c index a6f8f9f1..6d9b41f 100644 --- a/sys/dev/acpica/acpi_hpet.c +++ b/sys/dev/acpica/acpi_hpet.c @@ -29,14 +29,14 @@ __FBSDID("$FreeBSD$"); #include "opt_acpi.h" #include <sys/param.h> +#include <sys/bus.h> #include <sys/kernel.h> #include <sys/module.h> #include <sys/rman.h> #include <sys/time.h> #include <sys/timetc.h> -#include <sys/bus.h> + #include <contrib/dev/acpica/acpi.h> -#include "acpi_if.h" #include <dev/acpica/acpivar.h> ACPI_SERIAL_DECL(hpet, "ACPI HPET support"); @@ -47,11 +47,20 @@ ACPI_MODULE_NAME("HPET") struct acpi_hpet_softc { device_t dev; - struct resource *res[1]; + struct resource *mem_res; ACPI_HANDLE handle; }; -static unsigned hpet_get_timecount(struct timecounter *tc); +static u_int hpet_get_timecount(struct timecounter *tc); +static void acpi_hpet_test(struct acpi_hpet_softc *sc); + +static char *hpet_ids[] = { "PNP0103", NULL }; + +#define HPET_MEM_WIDTH 0x400 /* Expected memory region size */ +#define HPET_OFFSET_INFO 0 /* Location of info in region */ +#define HPET_OFFSET_PERIOD 4 /* Location of period (1/hz) */ +#define HPET_OFFSET_ENABLE 0x10 /* Location of enable word */ +#define HPET_OFFSET_VALUE 0xf0 /* Location of actual timer value */ struct timecounter hpet_timecounter = { .tc_get_timecount = hpet_get_timecount, @@ -60,40 +69,36 @@ struct timecounter hpet_timecounter = { .tc_quality = -200, }; -static char *hpet_ids[] = { "PNP0103", NULL }; - -static unsigned +static u_int hpet_get_timecount(struct timecounter *tc) { struct acpi_hpet_softc *sc; sc = tc->tc_priv; - return (bus_read_4(sc->res[0], 0xf0)); + return (bus_read_4(sc->mem_res, HPET_OFFSET_VALUE)); } static int acpi_hpet_probe(device_t dev) { + ACPI_FUNCTION_TRACE((char *)(uintptr_t) __func__); + if (acpi_disabled("hpet") || ACPI_ID_PROBE(device_get_parent(dev), dev, hpet_ids) == NULL || device_get_unit(dev) != 0) return (ENXIO); - device_set_desc(dev, "HPET - High Precision Event Timers"); + device_set_desc(dev, "High Precision Event Timer"); return (0); } -static struct resource_spec hpet_res_spec[] = { - { SYS_RES_MEMORY, 0, RF_ACTIVE}, - { -1, 0, 0} -}; - static int acpi_hpet_attach(device_t dev) { - struct acpi_hpet_softc *sc; - int error; - uint32_t u; + struct acpi_hpet_softc *sc; + int rid; + uint32_t val; + uintmax_t freq; ACPI_FUNCTION_TRACE((char *)(uintptr_t) __func__); @@ -101,27 +106,58 @@ acpi_hpet_attach(device_t dev) sc->dev = dev; sc->handle = acpi_get_handle(dev); - error = bus_alloc_resources(dev, hpet_res_spec, sc->res); - if (error) - return (error); + rid = 0; + sc->mem_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, + RF_ACTIVE); + if (sc->mem_res == NULL) + return (ENOMEM); + + /* Validate that we can access the whole region. */ + if (rman_get_size(sc->mem_res) < HPET_MEM_WIDTH) { + device_printf(dev, "memory region width %ld too small\n", + rman_get_size(sc->mem_res)); + bus_free_resource(dev, SYS_RES_MEMORY, sc->mem_res); + return (ENXIO); + } + + /* Read basic statistics about the timer. */ + val = bus_read_4(sc->mem_res, HPET_OFFSET_PERIOD); + freq = (1000000000000000LL + val / 2) / val; + if (bootverbose) { + val = bus_read_4(sc->mem_res, HPET_OFFSET_INFO); + device_printf(dev, + "vend: 0x%x rev: 0x%x num: %d hz: %jd opts:%s%s\n", + val >> 16, val & 0xff, (val >> 18) & 0xf, freq, + ((val >> 15) & 1) ? " leg_route" : "", + ((val >> 13) & 1) ? " count_size" : ""); + } + + /* Be sure it is enabled. */ + bus_write_4(sc->mem_res, HPET_OFFSET_ENABLE, 1); - u = bus_read_4(sc->res[0], 0x0); - device_printf(dev, "Vendor: 0x%x\n", u >> 16); - device_printf(dev, "Leg_Route_Cap: %d\n", (u >> 15) & 1); - device_printf(dev, "Count_Size_Cap: %d\n", (u >> 13) & 1); - device_printf(dev, "Num_Tim_Cap: %d\n", (u >> 18) & 0xf); - device_printf(dev, "Rev_id: 0x%x\n", u & 0xff); + if (testenv("debug.acpi.hpet_test")) + acpi_hpet_test(sc); - u = bus_read_4(sc->res[0], 0x4); - device_printf(dev, "Period: %d fs (%jd Hz)\n", - u, (intmax_t)((1000000000000000LL + u / 2) / u)); + hpet_timecounter.tc_frequency = freq; + hpet_timecounter.tc_priv = sc; + tc_init(&hpet_timecounter); + + return (0); +} - hpet_timecounter.tc_frequency = (1000000000000000LL + u / 2) / u; +static int +acpi_hpet_detach(device_t dev) +{ + ACPI_FUNCTION_TRACE((char *)(uintptr_t) __func__); - bus_write_4(sc->res[0], 0x10, 1); + /* XXX Without a tc_remove() function, we can't detach. */ + return (EBUSY); +} -#if 0 - { +/* Print some basic latency/rate information to assist in debugging. */ +static void +acpi_hpet_test(struct acpi_hpet_softc *sc) +{ int i; uint32_t u1, u2; struct bintime b0, b1, b2; @@ -130,47 +166,21 @@ acpi_hpet_attach(device_t dev) binuptime(&b0); binuptime(&b0); binuptime(&b1); - u1 = bus_read_4(sc->res[0], 0xf0); + u1 = bus_read_4(sc->mem_res, HPET_OFFSET_VALUE); for (i = 1; i < 1000; i++) - u2 = bus_read_4(sc->res[0], 0xf0); + u2 = bus_read_4(sc->mem_res, HPET_OFFSET_VALUE); binuptime(&b2); - u2 = bus_read_4(sc->res[0], 0xf0); + u2 = bus_read_4(sc->mem_res, HPET_OFFSET_VALUE); bintime_sub(&b2, &b1); bintime_sub(&b1, &b0); bintime_sub(&b2, &b1); bintime2timespec(&b2, &ts); - device_printf(dev, "%ld.%09ld: %u ... %u = %u\n", + device_printf(sc->dev, "%ld.%09ld: %u ... %u = %u\n", (long)ts.tv_sec, ts.tv_nsec, u1, u2, u2 - u1); - device_printf(dev, "time per call: %ld ns\n", ts.tv_nsec / 1000); - } -#endif - - device_printf(sc->dev, "HPET attach\n"); - - hpet_timecounter.tc_priv = sc; - - tc_init(&hpet_timecounter); - - return (0); -} - -static int -acpi_hpet_detach(device_t dev) -{ - ACPI_FUNCTION_TRACE((char *)(uintptr_t) __func__); - -#if 1 - return (EBUSY); -#else - struct acpi_hpet_softc *sc = device_get_softc(dev); - bus_release_resources(dev, hpet_res_spec, sc->res); - - device_printf(sc->dev, "HPET detach\n"); - return (0); -#endif + device_printf(sc->dev, "time per call: %ld ns\n", ts.tv_nsec / 1000); } static device_method_t acpi_hpet_methods[] = { |