--- /dev/null
+/*
+ * Copyright (c) 2005-2006 Apple Computer, Inc. All rights reserved.
+ *
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
+ *
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. The rights granted to you under the License
+ * may not be used to create, or enable the creation or redistribution of,
+ * unlawful or unlicensed copies of an Apple operating system, or to
+ * circumvent, violate, or enable the circumvention or violation of, any
+ * terms of an Apple operating system software license agreement.
+ *
+ * Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this file.
+ *
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
+ * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
+ *
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
+ */
+
+#include <string.h>
+#include <mach/vm_param.h>
+#include <mach/vm_prot.h>
+#include <mach/machine.h>
+#include <mach/time_value.h>
+#include <kern/spl.h>
+#include <kern/assert.h>
+#include <kern/debug.h>
+#include <kern/misc_protos.h>
+#include <kern/startup.h>
+#include <kern/clock.h>
+#include <kern/cpu_data.h>
+#include <kern/processor.h>
+#include <vm/vm_page.h>
+#include <vm/pmap.h>
+#include <vm/vm_kern.h>
+#include <i386/pmap.h>
+#include <i386/misc_protos.h>
+#include <i386/cpuid.h>
+#include <i386/mp.h>
+#include <i386/machine_cpu.h>
+#include <i386/machine_routines.h>
+#include <i386/io_map_entries.h>
+#include <architecture/i386/pio.h>
+#include <i386/cpuid.h>
+#include <i386/apic.h>
+#include <i386/tsc.h>
+#include <i386/hpet.h>
+#include <i386/pmCPU.h>
+#include <pexpert/device_tree.h>
+#if MACH_KDB
+#include <ddb/db_aout.h>
+#include <ddb/db_access.h>
+#include <ddb/db_sym.h>
+#include <ddb/db_variables.h>
+#include <ddb/db_command.h>
+#include <ddb/db_output.h>
+#include <ddb/db_expr.h>
+#endif /* MACH_KDB */
+#include <ddb/tr.h>
+
+/* Decimal powers: */
+#define kilo (1000ULL)
+#define Mega (kilo * kilo)
+#define Giga (kilo * Mega)
+#define Tera (kilo * Giga)
+#define Peta (kilo * Tera)
+
+uint32_t hpetArea = 0;
+uint32_t hpetAreap = 0;
+uint64_t hpetFemto = 0;
+uint64_t hpetFreq = 0;
+uint64_t hpetCvt = 0; /* (TAKE OUT LATER) */
+uint64_t hpetCvtt2n = 0;
+uint64_t hpetCvtn2t = 0;
+uint64_t tsc2hpet = 0;
+uint64_t hpet2tsc = 0;
+uint64_t bus2hpet = 0;
+uint64_t hpet2bus = 0;
+
+uint32_t rcbaArea = 0;
+uint32_t rcbaAreap = 0;
+
+#if DEBUG
+#define DBG(x...) kprintf("DBG: " x)
+#else
+#define DBG(x...)
+#endif
+
+/*
+ * Map the RCBA area.
+ */
+static void
+map_rcbaArea(void)
+{
+ /*
+ * Get RCBA area physical address and map it
+ */
+ outl(cfgAdr, lpcCfg | (0xF0 & 0xFC));
+ rcbaAreap = inl(cfgDat | (0xF0 & 0x03));
+ rcbaArea = io_map_spec(rcbaAreap & -4096, PAGE_SIZE * 4, VM_WIMG_IO);
+ kprintf("RCBA: vaddr = %08X, paddr = %08X\n", rcbaArea, rcbaAreap);
+}
+
+/*
+ * Initialize the HPET
+ */
+void
+hpet_init(void)
+{
+ unsigned int *xmod;
+
+ map_rcbaArea();
+
+ /*
+ * Is the HPET memory already enabled?
+ * If not, set address and enable.
+ */
+ xmod = (uint32_t *)(rcbaArea + 0x3404); /* Point to the HPTC */
+ uint32_t hptc = *xmod; /* Get HPET config */
+ DBG(" current RCBA.HPTC: %08X\n", *xmod);
+ if(!(hptc & hptcAE)) {
+ DBG("HPET memory is not enabled, "
+ "enabling and assigning to 0xFED00000 (hope that's ok)\n");
+ *xmod = (hptc & ~3) | hptcAE;
+ }
+
+ /*
+ * Get physical address of HPET and map it.
+ */
+ hpetAreap = hpetAddr | ((hptc & 3) << 12);
+ hpetArea = io_map_spec(hpetAreap & -4096, PAGE_SIZE * 4, VM_WIMG_IO);
+ kprintf("HPET: vaddr = %08X, paddr = %08X\n", hpetArea, hpetAreap);
+
+ /*
+ * Extract the HPET tick rate.
+ * The period of the HPET is reported in femtoseconds (10**-15s)
+ * and convert to frequency in hertz.
+ */
+ hpetFemto = (uint32_t)(((hpetReg_t *)hpetArea)->GCAP_ID >> 32);
+ hpetFreq = (1 * Peta) / hpetFemto;
+
+ /*
+ * The conversion factor is the number of nanoseconds per HPET tick
+ * with about 32 bits of fraction. The value is converted to a
+ * base-2 fixed point number. To convert from HPET to nanoseconds,
+ * multiply the value by the conversion factor using 96-bit arithmetic,
+ * then shift right 32 bits. If the value is known to be small,
+ * 64-bit arithmetic will work.
+ */
+
+ /*
+ * Begin conversion of base 10 femtoseconds to base 2, calculate:
+ * - HPET ticks to nanoseconds conversion in base 2 fraction (* 2**32)
+ * - nanoseconds to HPET ticks conversion
+ */
+ hpetCvtt2n = (uint64_t)hpetFemto << 32;
+ hpetCvtt2n = hpetCvtt2n / 1000000ULL;
+ hpetCvtn2t = 0xFFFFFFFFFFFFFFFFULL / hpetCvtt2n;
+ kprintf("HPET: Frequency = %6d.%04dMHz, "
+ "cvtt2n = %08X.%08X, cvtn2t = %08X.%08X\n",
+ (uint32_t)(hpetFreq / Mega), (uint32_t)(hpetFreq % Mega),
+ (uint32_t)(hpetCvtt2n >> 32), (uint32_t)hpetCvtt2n,
+ (uint32_t)(hpetCvtn2t >> 32), (uint32_t)hpetCvtn2t);
+
+
+ /* (TAKE OUT LATER)
+ * Begin conversion of base 10 femtoseconds to base 2
+ * HPET ticks to nanoseconds in base 2 fraction (times 1048576)
+ */
+ hpetCvt = (uint64_t)hpetFemto << 20;
+ hpetCvt = hpetCvt / 1000000ULL;
+
+ /* Calculate conversion from TSC to HPET */
+ tsc2hpet = tmrCvt(tscFCvtt2n, hpetCvtn2t);
+ DBG(" CVT: TSC to HPET = %08X.%08X\n",
+ (uint32_t)(tsc2hpet >> 32), (uint32_t)tsc2hpet);
+
+ /* Calculate conversion from HPET to TSC */
+ hpet2tsc = tmrCvt(hpetCvtt2n, tscFCvtn2t);
+ DBG(" CVT: HPET to TSC = %08X.%08X\n",
+ (uint32_t)(hpet2tsc >> 32), (uint32_t)hpet2tsc);
+
+ /* Calculate conversion from BUS to HPET */
+ bus2hpet = tmrCvt(busFCvtt2n, hpetCvtn2t);
+ DBG(" CVT: BUS to HPET = %08X.%08X\n",
+ (uint32_t)(bus2hpet >> 32), (uint32_t)bus2hpet);
+
+ /* Calculate conversion from HPET to BUS */
+ hpet2bus = tmrCvt(hpetCvtt2n, busFCvtn2t);
+ DBG(" CVT: HPET to BUS = %08X.%08X\n",
+ (uint32_t)(hpet2bus >> 32), (uint32_t)hpet2bus);
+
+ /* Make sure the counter is off in the HPET configuration flags */
+ uint64_t hpetcon = ((hpetReg_t *)hpetArea)->GEN_CONF;
+ hpetcon = hpetcon & ~1;
+ ((hpetReg_t *)hpetArea)->GEN_CONF = hpetcon;
+
+ /*
+ * Convert current TSC to HPET value,
+ * set it, and start it ticking.
+ */
+ uint64_t currtsc = rdtsc64();
+ uint64_t tscInHPET = tmrCvt(currtsc, tsc2hpet);
+ ((hpetReg_t *)hpetArea)->MAIN_CNT = tscInHPET;
+ hpetcon = hpetcon | 1;
+ ((hpetReg_t *)hpetArea)->GEN_CONF = hpetcon;
+ kprintf("HPET started: TSC = %08X.%08X, HPET = %08X.%08X\n",
+ (uint32_t)(currtsc >> 32), (uint32_t)currtsc,
+ (uint32_t)(tscInHPET >> 32), (uint32_t)tscInHPET);
+
+#if MACH_KDB
+ db_display_hpet((hpetReg_t *)hpetArea); /* (BRINGUP) */
+#endif
+}
+
+/*
+ * This routine is used to get various information about the HPET
+ * without having to export gobs of globals. It fills in a data
+ * structure with the info.
+ */
+void
+hpet_get_info(hpetInfo_t *info)
+{
+ info->hpetCvtt2n = hpetCvtt2n;
+ info->hpetCvtn2t = hpetCvtn2t;
+ info->tsc2hpet = tsc2hpet;
+ info->hpet2tsc = hpet2tsc;
+ info->bus2hpet = bus2hpet;
+ info->hpet2bus = hpet2bus;
+ info->rcbaArea = rcbaArea;
+ info->rcbaAreap = rcbaAreap;
+}
+
+
+/*
+ * This routine is called by the HPET driver
+ * when it assigns an HPET timer to a processor
+ */
+
+void
+ml_hpet_cfg(uint32_t cpu, uint32_t hpetVect)
+{
+ uint64_t *hpetVaddr;
+ uint64_t hpetcnf;
+
+ if(cpu > 1) {
+ panic("ml_hpet_cfg: invalid cpu = %d\n", cpu);
+ }
+
+ /* Calculate address of the HPET for this processor */
+ hpetVaddr = (uint64_t *)(((uint32_t)&(((hpetReg_t *)hpetArea)->TIM1_CONF)) + (cpu << 5));
+
+ DBG("ml_hpet_cfg: HPET for cpu %d at %08X, vector = %d\n",
+ cpu, hpetVaddr, hpetVect);
+
+ /* Save the address and vector of the HPET for this processor */
+ cpu_data_ptr[cpu]->cpu_pmHpet = (uint64_t *)hpetVaddr;
+ cpu_data_ptr[cpu]->cpu_pmHpetVec = hpetVect;
+
+ /* Enable the interruptions now that we have a vector */
+ hpetcnf = *hpetVaddr;
+ hpetcnf = hpetcnf | Tn_INT_ENB_CNF;
+ *hpetVaddr = hpetcnf;
+
+ /* Save the configuration */
+ cpu_data_ptr[cpu]->cpu_pmStats.pmHpetCfg = hpetcnf;
+ cpu_data_ptr[cpu]->cpu_pmStats.pmHpetCmp = 0;
+
+ /* See if nap policy has changed now */
+ machine_nap_policy();
+
+}
+
+/*
+ * This is the HPET interrupt handler.
+ *
+ * We really don't want to be here, but so far, I haven't figured out
+ * a way to cancel the interrupt. Hopefully, some day we will figure out
+ * how to do that or switch all timers to the HPET.
+ */
+int
+HPETInterrupt(void)
+{
+
+ /* All we do here is to bump the count */
+ current_cpu_datap()->cpu_pmStats.pmHPETRupt++;
+
+ /* Return and show that the 'rupt has been handled... */
+ return 1;
+}
+
+
+static hpetReg_t saved_hpet;
+
+void hpet_save( void )
+{
+ hpetReg_t *from = (hpetReg_t *) hpetArea;
+ hpetReg_t *to = &saved_hpet;
+
+ to->GEN_CONF = from->GEN_CONF;
+ to->TIM0_CONF = from->TIM0_CONF;
+ to->TIM0_COMP = from->TIM0_COMP;
+ to->TIM1_CONF = from->TIM1_CONF;
+ to->TIM1_COMP = from->TIM1_COMP;
+ to->TIM2_CONF = from->TIM2_CONF;
+ to->TIM2_COMP = from->TIM2_COMP;
+ to->MAIN_CNT = from->MAIN_CNT;
+}
+
+void hpet_restore( void )
+{
+ hpetReg_t *from = &saved_hpet;
+ hpetReg_t *to = (hpetReg_t *) hpetArea;
+
+ /*
+ * Is the HPET memory already enabled?
+ * If not, set address and enable.
+ */
+ uint32_t *hptcp = (uint32_t *)(rcbaArea + 0x3404);
+ uint32_t hptc = *hptcp;
+ if(!(hptc & hptcAE)) {
+ DBG("HPET memory is not enabled, "
+ "enabling and assigning to 0xFED00000 (hope that's ok)\n");
+ *hptcp = (hptc & ~3) | hptcAE;
+ }
+
+ to->GEN_CONF = from->GEN_CONF & ~1;
+
+ to->TIM0_CONF = from->TIM0_CONF;
+ to->TIM0_COMP = from->TIM0_COMP;
+ to->TIM1_CONF = from->TIM1_CONF;
+ to->TIM1_COMP = from->TIM1_COMP;
+ to->TIM2_CONF = from->TIM2_CONF;
+ to->TIM2_COMP = from->TIM2_COMP;
+ to->GINTR_STA = -1ULL;
+ to->MAIN_CNT = from->MAIN_CNT;
+
+ to->GEN_CONF = from->GEN_CONF;
+}
+
+/*
+ * Read the HPET timer
+ *
+ */
+uint64_t
+rdHPET(void)
+{
+ hpetReg_t *hpetp = (hpetReg_t *) hpetArea;
+ volatile uint32_t *regp = (uint32_t *) &hpetp->MAIN_CNT;
+ uint32_t high;
+ uint32_t low;
+
+ do {
+ high = *(regp + 1);
+ low = *regp;
+ } while (high != *(regp + 1));
+
+ return (((uint64_t) high) << 32) | low;
+}
+
+#if MACH_KDB
+
+#define HI32(x) ((uint32_t)(((x) >> 32) & 0xFFFFFFFF))
+#define LO32(x) ((uint32_t)((x) & 0xFFFFFFFF))
+
+/*
+ * Displays HPET memory mapped area
+ * hp
+ */
+void
+db_hpet(__unused db_expr_t addr, __unused int have_addr, __unused db_expr_t count, __unused char *modif)
+{
+
+ db_display_hpet((hpetReg_t *) hpetArea); /* Dump out the HPET
+ * stuff */
+ return;
+}
+
+void
+db_display_hpet(hpetReg_t * hpt)
+{
+
+ uint64_t cmain;
+
+ cmain = hpt->MAIN_CNT; /* Get the main timer */
+
+ /* General capabilities */
+ db_printf(" GCAP_ID = %08X.%08X\n",
+ HI32(hpt->GCAP_ID), LO32(hpt->GCAP_ID));
+ /* General configuration */
+ db_printf(" GEN_CONF = %08X.%08X\n",
+ HI32(hpt->GEN_CONF), LO32(hpt->GEN_CONF));
+ /* General Interrupt status */
+ db_printf("GINTR_STA = %08X.%08X\n",
+ HI32(hpt->GINTR_STA), LO32(hpt->GINTR_STA));
+ /* Main counter */
+ db_printf(" MAIN_CNT = %08X.%08X\n",
+ HI32(cmain), LO32(cmain));
+ /* Timer 0 config and cap */
+ db_printf("TIM0_CONF = %08X.%08X\n",
+ HI32(hpt->TIM0_CONF), LO32(hpt->TIM0_CONF));
+ /* Timer 0 comparator */
+ db_printf("TIM0_COMP = %08X.%08X\n",
+ HI32(hpt->TIM0_COMP), LO32(hpt->TIM0_COMP));
+ /* Timer 1 config and cap */
+ db_printf("TIM0_CONF = %08X.%08X\n",
+ HI32(hpt->TIM1_CONF), LO32(hpt->TIM1_CONF));
+ /* Timer 1 comparator */
+ db_printf("TIM1_COMP = %08X.%08X\n",
+ HI32(hpt->TIM1_COMP), LO32(hpt->TIM1_COMP));
+ /* Timer 2 config and cap */
+ db_printf("TIM2_CONF = %08X.%08X\n",
+ HI32(hpt->TIM2_CONF), LO32(hpt->TIM2_CONF));
+ /* Timer 2 comparator */
+ db_printf("TIM2_COMP = %08X.%08X\n",
+ HI32(hpt->TIM2_COMP), LO32(hpt->TIM2_COMP));
+
+ db_printf("\nHPET Frequency = %d.%05dMHz\n",
+ (uint32_t) (hpetFreq / 1000000), (uint32_t) (hpetFreq % 1000000));
+
+ return;
+
+}
+
+#endif
projects / apple / xnu.git / blobdiff