Dump the HPET information block.
What is the HPET I hear you ask? It is the High Precision Event Timer that is supposed to supplement and eventually replace the 8254 timer and the RTC periodic interrupts. Among other things, it is 64 bit (can be run in 32 bit mode for 32 bit cpus), and is suitable as a replacement for the ACPI timer on SMP systems (the specs are much better) and as a replacement for the ITC based synthetic clock for on ia64 systems. It seems IA64 and AMD64 systems tend to have this. It is likely to start showing up in i386 systems if it isn't already on some of them.
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parent
6a1909919b
commit
79d7565c5a
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=118334
@ -295,6 +295,29 @@ acpi_handle_apic(struct ACPIsdt *sdp)
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printf(END_COMMENT);
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}
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static void
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acpi_handle_hpet(struct ACPIsdt *sdp)
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{
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struct HPETbody *hpetp;
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acpi_print_sdt(sdp);
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hpetp = (struct HPETbody *) sdp->body;
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printf(BEGIN_COMMENT);
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printf("\tHPET Number=%d\n", hpetp->hpet_number);
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printf("\tADDR=0x%08x\n", hpetp->base_addr);
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printf("\tHW Rev=0x%x\n", hpetp->block_hwrev);
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printf("\tComparitors=%d\n", hpetp->block_comparitors);
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printf("\tCounter Size=%d\n", hpetp->block_counter_size);
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printf("\tLegacy IRQ routing capable={");
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if (hpetp->block_legacy_capable)
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printf("TRUE}\n");
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else
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printf("FALSE}\n");
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printf("\tPCI Vendor ID=0x%04x\n", hpetp->block_pcivendor);
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printf("\tMinimul Tick=%d\n", hpetp->clock_tick);
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printf(END_COMMENT);
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}
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static void
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init_namespace()
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{
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@ -522,6 +545,8 @@ acpi_handle_rsdt(struct ACPIsdt *rsdp)
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acpi_handle_facp((struct FACPbody *) sdp->body);
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} else if (!memcmp(sdp->signature, "APIC", 4)) {
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acpi_handle_apic(sdp);
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} else if (!memcmp(sdp->signature, "HPET", 4)) {
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acpi_handle_hpet(sdp);
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} else {
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acpi_print_sdt(sdp);
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}
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@ -265,6 +265,19 @@ struct MADTbody {
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u_char body[1];
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} __packed;
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struct HPETbody {
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u_int32_t block_hwrev:8,
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block_comparitors:5,
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block_counter_size:1,
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:1,
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block_legacy_capable:1,
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block_pcivendor:16;
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u_int32_t base_addr;
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u_int64_t reserved1;
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u_int8_t hpet_number;
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u_int16_t clock_tick __packed;
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} __packed;
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void *acpi_map_physical(vm_offset_t, size_t);
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struct ACPIrsdp *acpi_find_rsd_ptr(void);
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int acpi_checksum(void *, size_t);
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