mirror of
https://github.com/justinian/jsix.git
synced 2025-12-10 00:14:32 -08:00
Justin C. Miller
8bb9e22218
In order to implement capabilities on system resources like IRQs so that they may be restricted to drivers only, add a new 'system' kobject type, and move the bind_irq functionality from endpoint to system. Also fix some stack bugs passing the initial handles to a program.
404 lines
9.5 KiB
C++
404 lines
9.5 KiB
C++
#include <stddef.h>
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#include <stdint.h>
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#include "kutil/assert.h"
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#include "kutil/memory.h"
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#include "acpi_tables.h"
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#include "apic.h"
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#include "clock.h"
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#include "console.h"
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#include "device_manager.h"
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#include "interrupts.h"
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#include "kernel_memory.h"
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#include "log.h"
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#include "objects/endpoint.h"
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static endpoint * const ignore_endpoint = reinterpret_cast<endpoint*>(-1ull);
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static const char expected_signature[] = "RSD PTR ";
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device_manager device_manager::s_instance;
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struct acpi1_rsdp
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{
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char signature[8];
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uint8_t checksum;
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char oem_id[6];
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uint8_t revision;
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uint32_t rsdt_address;
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} __attribute__ ((packed));
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struct acpi2_rsdp
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{
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char signature[8];
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uint8_t checksum10;
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char oem_id[6];
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uint8_t revision;
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uint32_t rsdt_address;
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uint32_t length;
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uint64_t xsdt_address;
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uint8_t checksum20;
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uint8_t reserved[3];
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} __attribute__ ((packed));
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bool
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acpi_table_header::validate(uint32_t expected_type) const
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{
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if (kutil::checksum(this, length) != 0) return false;
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return !expected_type || (expected_type == type);
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}
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void irq2_callback(void *)
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{
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}
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void irq4_callback(void *)
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{
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// TODO: move this to a real serial driver
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console *cons = console::get();
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cons->echo();
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}
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device_manager::device_manager() :
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m_lapic(0)
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{
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m_irqs.ensure_capacity(32);
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m_irqs.set_size(16);
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for (int i = 0; i < 16; ++i)
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m_irqs[i] = nullptr;
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m_irqs[2] = ignore_endpoint;
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}
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void
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device_manager::parse_acpi(const void *root_table)
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{
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kassert(root_table != 0, "ACPI root table pointer is null.");
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const acpi1_rsdp *acpi1 =
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reinterpret_cast<const acpi1_rsdp *>(root_table);
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for (int i = 0; i < sizeof(acpi1->signature); ++i)
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kassert(acpi1->signature[i] == expected_signature[i],
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"ACPI RSDP table signature mismatch");
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uint8_t sum = kutil::checksum(acpi1, sizeof(acpi1_rsdp), 0);
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kassert(sum == 0, "ACPI 1.0 RSDP checksum mismatch.");
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kassert(acpi1->revision > 1, "ACPI 1.0 not supported.");
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const acpi2_rsdp *acpi2 =
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reinterpret_cast<const acpi2_rsdp *>(acpi1);
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sum = kutil::checksum(acpi2, sizeof(acpi2_rsdp), sizeof(acpi1_rsdp));
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kassert(sum == 0, "ACPI 2.0 RSDP checksum mismatch.");
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load_xsdt(reinterpret_cast<const acpi_xsdt *>(acpi2->xsdt_address));
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}
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ioapic *
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device_manager::get_ioapic(int i)
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{
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return (i < m_ioapics.count()) ? &m_ioapics[i] : nullptr;
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}
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static void
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put_sig(char *into, uint32_t type)
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{
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for (int j=0; j<4; ++j) into[j] = reinterpret_cast<char *>(&type)[j];
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}
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void
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device_manager::load_xsdt(const acpi_xsdt *xsdt)
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{
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kassert(xsdt && acpi_validate(xsdt), "Invalid ACPI XSDT.");
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char sig[5] = {0,0,0,0,0};
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log::info(logs::device, "ACPI 2.0+ tables loading");
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put_sig(sig, xsdt->header.type);
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log::debug(logs::device, " Found table %s", sig);
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size_t num_tables = acpi_table_entries(xsdt, sizeof(void*));
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for (size_t i = 0; i < num_tables; ++i) {
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const acpi_table_header *header = xsdt->headers[i];
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put_sig(sig, header->type);
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log::debug(logs::device, " Found table %s", sig);
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kassert(header->validate(), "Table failed validation.");
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switch (header->type) {
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case acpi_apic::type_id:
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load_apic(reinterpret_cast<const acpi_apic *>(header));
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break;
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case acpi_mcfg::type_id:
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load_mcfg(reinterpret_cast<const acpi_mcfg *>(header));
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break;
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case acpi_hpet::type_id:
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load_hpet(reinterpret_cast<const acpi_hpet *>(header));
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break;
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default:
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break;
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}
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}
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}
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void
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device_manager::load_apic(const acpi_apic *apic)
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{
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uintptr_t local = apic->local_address;
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m_lapic = new lapic(local, isr::isrSpurious);
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size_t count = acpi_table_entries(apic, 1);
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uint8_t const *p = apic->controller_data;
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uint8_t const *end = p + count;
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// Pass one: count IOAPIC objcts
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int num_ioapics = 0;
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while (p < end) {
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const uint8_t type = p[0];
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const uint8_t length = p[1];
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if (type == 1) num_ioapics++;
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p += length;
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}
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m_ioapics.set_capacity(num_ioapics);
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// Pass two: set up IOAPIC objcts
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p = apic->controller_data;
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while (p < end) {
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const uint8_t type = p[0];
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const uint8_t length = p[1];
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if (type == 1) {
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uintptr_t base = kutil::read_from<uint32_t>(p+4);
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uint32_t base_gsr = kutil::read_from<uint32_t>(p+8);
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m_ioapics.emplace(base, base_gsr);
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}
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p += length;
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}
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// Pass three: configure APIC objects
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p = apic->controller_data;
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while (p < end) {
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const uint8_t type = p[0];
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const uint8_t length = p[1];
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switch (type) {
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case 0: { // Local APIC
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uint8_t uid = kutil::read_from<uint8_t>(p+2);
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uint8_t id = kutil::read_from<uint8_t>(p+3);
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log::debug(logs::device, " Local APIC uid %x id %x", id);
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}
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break;
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case 1: // I/O APIC
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break;
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case 2: { // Interrupt source override
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uint8_t source = kutil::read_from<uint8_t>(p+3);
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isr gsi = isr::irq00 + kutil::read_from<uint32_t>(p+4);
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uint16_t flags = kutil::read_from<uint16_t>(p+8);
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log::debug(logs::device, " Intr source override IRQ %d -> %d Pol %d Tri %d",
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source, gsi, (flags & 0x3), ((flags >> 2) & 0x3));
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// TODO: in a multiple-IOAPIC system this might be elsewhere
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m_ioapics[0].redirect(source, static_cast<isr>(gsi), flags, true);
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}
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break;
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case 4: {// LAPIC NMI
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uint8_t cpu = kutil::read_from<uint8_t>(p + 2);
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uint8_t num = kutil::read_from<uint8_t>(p + 5);
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uint16_t flags = kutil::read_from<uint16_t>(p + 3);
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log::debug(logs::device, " LAPIC NMI Proc %d LINT%d Pol %d Tri %d",
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kutil::read_from<uint8_t>(p+2),
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kutil::read_from<uint8_t>(p+5),
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kutil::read_from<uint16_t>(p+3) & 0x3,
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(kutil::read_from<uint16_t>(p+3) >> 2) & 0x3);
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m_lapic->enable_lint(num, num == 0 ? isr::isrLINT0 : isr::isrLINT1, true, flags);
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}
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break;
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default:
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log::debug(logs::device, " APIC entry type %d", type);
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}
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p += length;
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}
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for (uint8_t i = 0; i < m_ioapics[0].get_num_gsi(); ++i) {
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switch (i) {
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case 2: break;
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default: m_ioapics[0].mask(i, false);
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}
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}
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m_lapic->enable();
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}
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void
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device_manager::load_mcfg(const acpi_mcfg *mcfg)
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{
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size_t count = acpi_table_entries(mcfg, sizeof(acpi_mcfg_entry));
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m_pci.set_size(count);
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m_devices.set_capacity(16);
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for (unsigned i = 0; i < count; ++i) {
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const acpi_mcfg_entry &mcfge = mcfg->entries[i];
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m_pci[i].group = mcfge.group;
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m_pci[i].bus_start = mcfge.bus_start;
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m_pci[i].bus_end = mcfge.bus_end;
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m_pci[i].base = memory::to_virtual<uint32_t>(mcfge.base);
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log::debug(logs::device, " Found MCFG entry: base %lx group %d bus %d-%d",
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mcfge.base, mcfge.group, mcfge.bus_start, mcfge.bus_end);
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}
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probe_pci();
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}
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void
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device_manager::load_hpet(const acpi_hpet *hpet)
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{
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log::debug(logs::device, " Found HPET device #%3d: base %016lx pmin %d attr %02x",
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hpet->index, hpet->base_address.address, hpet->periodic_min, hpet->attributes);
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uint32_t hwid = hpet->hardware_id;
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uint8_t rev_id = hwid & 0xff;
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uint8_t comparators = (hwid >> 8) & 0x1f;
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uint8_t count_size_cap = (hwid >> 13) & 1;
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uint8_t legacy_replacement = (hwid >> 15) & 1;
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uint32_t pci_vendor_id = (hwid >> 16);
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log::debug(logs::device, " rev:%02d comparators:%02d count_size_cap:%1d legacy_repl:%1d",
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rev_id, comparators, count_size_cap, legacy_replacement);
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log::debug(logs::device, " pci vendor id: %04x", pci_vendor_id);
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m_hpets.emplace(hpet->index,
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reinterpret_cast<uint64_t*>(hpet->base_address.address + ::memory::page_offset));
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}
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void
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device_manager::probe_pci()
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{
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for (auto &pci : m_pci) {
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log::debug(logs::device, "Probing PCI group at base %016lx", pci.base);
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for (int bus = pci.bus_start; bus <= pci.bus_end; ++bus) {
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for (int dev = 0; dev < 32; ++dev) {
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if (!pci.has_device(bus, dev, 0)) continue;
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auto &d0 = m_devices.emplace(pci, bus, dev, 0);
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if (!d0.multi()) continue;
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for (int i = 1; i < 8; ++i) {
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if (pci.has_device(bus, dev, i))
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m_devices.emplace(pci, bus, dev, i);
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}
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}
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}
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}
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}
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void
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device_manager::init_drivers()
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{
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// Eventually this should be e.g. a lookup into a loadable driver list
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// for now, just look for AHCI devices
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/*
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for (auto &device : m_devices) {
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if (device.devclass() != 1 || device.subclass() != 6)
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continue;
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if (device.progif() != 1) {
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log::warn(logs::device, "Found SATA device %d:%d:%d, but not an AHCI interface.",
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device.bus(), device.device(), device.function());
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}
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ahcid.register_device(&device);
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}
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*/
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if (m_hpets.count() > 0) {
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hpet &h = m_hpets[0];
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h.enable();
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// becomes the singleton
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clock *master_clock = new clock(h.rate(), hpet_clock_source, &h);
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kassert(master_clock, "Failed to allocate master clock");
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log::info(logs::clock, "Created master clock using HPET 0: Rate %d", h.rate());
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} else {
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//TODO: APIC clock?
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kassert(0, "No HPET master clock");
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}
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}
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bool
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device_manager::dispatch_irq(unsigned irq)
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{
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if (irq >= m_irqs.count())
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return false;
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endpoint *e = m_irqs[irq];
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if (!e || e == ignore_endpoint)
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return e == ignore_endpoint;
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e->signal_irq(irq);
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return true;
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}
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bool
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device_manager::bind_irq(unsigned irq, endpoint *target)
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{
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// TODO: grow if under max size
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if (irq >= m_irqs.count())
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return false;
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m_irqs[irq]= target;
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return true;
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}
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void
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device_manager::unbind_irqs(endpoint *target)
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{
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const size_t count = m_irqs.count();
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for (size_t i = 0; i < count; ++i) {
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if (m_irqs[i] == target)
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m_irqs[i] = nullptr;
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}
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}
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bool
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device_manager::allocate_msi(const char *name, pci_device &device, irq_callback cb, void *data)
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{
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/*
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// TODO: find gaps to fill
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uint8_t irq = m_irqs.count();
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isr vector = isr::irq00 + irq;
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m_irqs.append({name, cb, data});
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log::debug(logs::device, "Allocating IRQ %02x to %s.", irq, name);
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device.write_msi_regs(
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0xFEE00000,
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static_cast<uint16_t>(vector));
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*/
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return true;
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}
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void
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device_manager::register_block_device(block_device *blockdev)
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{
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m_blockdevs.append(blockdev);
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}
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