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This commit is contained in:
xyou
2026-07-31 13:53:49 +08:00
parent 5ea84fac97
commit f52157b7af
241 changed files with 26843 additions and 8155 deletions
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CODE/DKM/acpi/acpi.c
+180
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@@ -103,6 +103,15 @@ typedef struct __attribute__((packed)) {
u32 creator_revision;
} acpi_sdt_header;
/* ACPI Generic Address Structure (GAS) — HPET 等表使用 */
typedef struct __attribute__((packed)) {
u8 space_id; /* 0=SystemMemory, 1=SystemIO, 2=PCIConfig, ... */
u8 bit_width;
u8 bit_offset;
u8 access_size; /* 0=undefined, 1=byte, 2=word, 3=dword, 4=qword */
u64 address;
} acpi_generic_address;
/* ---------------------------------------------------------------
* Driver descriptor
* --------------------------------------------------------------- */
@@ -212,6 +221,168 @@ static const acpi_rsdp_v2 *acpi_find_rsdp(const void *limine_rsdp) {
return NULL;
}
/* ---------------------------------------------------------------
* MCFG (PCIe ECAM Memory-mapped Configuration) 解析
*
* **QEMU 无法测试但真机必需**: PCIe 配置空间通过 ECAM 访问,
* MCFG 表提供 ECAM 基址和总线范围。没有 MCFG 解析,
* 真机无法访问 Bus 0 以外的 PCIe 设备配置空间。
* QEMU 的 PCI 设备都在 Bus 0, 使用传统 CF8/CFC 端口即可。
* --------------------------------------------------------------- */
typedef struct __attribute__((packed)) {
u64 base_address; /* ECAM 基址 (4K 对齐, 256MB per bus) */
u16 pci_segment_group; /* PCI 段组号 (通常为 0) */
u8 start_bus_number; /* 起始总线号 */
u8 end_bus_number; /* 结束总线号 */
u32 reserved;
} mcfg_entry;
typedef struct __attribute__((packed)) {
acpi_sdt_header hdr;
u64 reserved; /* 保留, 通常为 0 */
/* mcfg_entry entries[] 紧跟 */
} mcfg_table;
static void acpi_parse_mcfg(const acpi_sdt_header *hdr) {
if (!hdr || hdr->length < sizeof(mcfg_table)) return;
const mcfg_table *mcfg = (const mcfg_table *)hdr;
u32 entry_size = sizeof(mcfg_entry);
u32 entries_len = mcfg->hdr.length - sizeof(mcfg_table);
u32 count = entries_len / entry_size;
g_log->info("[acpi] MCFG entries:");
log_hex("[acpi] count=", count);
for (u32 i = 0; i < count; i++) {
const mcfg_entry *e = (const mcfg_entry *)((const u8 *)mcfg + sizeof(mcfg_table) + i * entry_size);
log_hex("[acpi] MCFG base=", e->base_address);
log_hex("[acpi] MCFG seg=", e->pci_segment_group);
log_hex("[acpi] MCFG bus_start=", e->start_bus_number);
log_hex("[acpi] MCFG bus_end=", e->end_bus_number);
/* 验证 ECAM 基址合理性 */
if (e->base_address == 0 || e->base_address == 0xFFFFFFFFFFFFFFFFULL) {
g_log->warn("[acpi] MCFG entry has invalid base address");
continue;
}
/* 真机: ECAM 基址通常在 0xB0000000 - 0xBFFFFFFF (3G-4G 范围),
* 但也可能在 4G 以上 (特别是大内存系统) */
if (e->base_address >= 0x100000000ULL) {
g_log->info("[acpi] MCFG base above 4G — requires MMIO mapping");
}
}
}
/* ---------------------------------------------------------------
* HPET (High Precision Event Timer) 解析
*
* 真机需要 HPET 替代 PIT 作为高精度定时器源。
* QEMU 默认也提供 HPET, 但当前内核使用 PIT 即可。
* HPET 信息留作后续高精度定时器实现的参考。
* --------------------------------------------------------------- */
typedef struct __attribute__((packed)) {
u8 hardware_rev_id;
u8 comparator_count : 5;
u8 counter_size : 1; /* 0=32-bit, 1=64-bit */
u8 reserved0 : 1;
u8 legacy_replacement : 1; /* 1=LegacyReplacement IRQ routing available */
u16 pci_vendor_id;
acpi_generic_address address; /* HPET 寄存器基址 */
u8 hpet_number;
u16 minimum_tick;
u8 page_protection;
} hpet_entry_data;
/* HPET 表不含子条目, 只有 1 个 data block */
typedef struct __attribute__((packed)) {
acpi_sdt_header hdr;
u32 event_timer_block_id; /* 与 hpet_entry_data 的前 4 字节相同 */
acpi_generic_address base_address;
u8 hpet_number;
u16 minimum_tick;
u8 page_protection;
} hpet_table;
static void acpi_parse_hpet(const acpi_sdt_header *hdr) {
if (!hdr || hdr->length < sizeof(hpet_table)) return;
const hpet_table *hpet = (const hpet_table *)hdr;
u32 block_id = hpet->event_timer_block_id;
u8 comp_count = (block_id >> 8) & 0x1f;
u8 count_size = (block_id >> 13) & 1;
u8 legacy = (block_id >> 15) & 1;
u8 rev_id = block_id & 0xff;
u16 vendor_id = (block_id >> 16) & 0xffff;
g_log->info("[acpi] HPET info:");
log_hex("[acpi] rev_id=", rev_id);
log_hex("[acpi] comparators=", comp_count);
log_hex("[acpi] counter_size=", count_size ? 64 : 32);
log_hex("[acpi] legacy_irq=", legacy);
log_hex("[acpi] vendor_id=", vendor_id);
log_hex("[acpi] min_tick=", hpet->minimum_tick);
/* HPET 地址空间类型 */
if (hpet->base_address.space_id == 0) {
/* System Memory — MMIO 访问 */
u64 addr = hpet->base_address.address;
log_hex("[acpi] HPET MMIO addr=", addr);
if (addr >= 0x100000000ULL) {
g_log->info("[acpi] HPET base above 4G — requires MMIO mapping");
}
} else if (hpet->base_address.space_id == 1) {
/* System I/O — 端口 I/O */
log_hex("[acpi] HPET I/O port=", hpet->base_address.address);
}
}
/* ---------------------------------------------------------------
* MADT (APIC) 解析 — 为 apic 驱动提供数据
* --------------------------------------------------------------- */
typedef struct __attribute__((packed)) {
acpi_sdt_header hdr;
u32 lapic_addr;
u32 flags;
} acpi_madt;
static void acpi_parse_madt(const acpi_sdt_header *hdr) {
if (!hdr || hdr->length < sizeof(acpi_madt)) return;
const acpi_madt *madt = (const acpi_madt *)hdr;
g_log->info("[acpi] MADT detail:");
log_hex("[acpi] LAPIC addr=", madt->lapic_addr);
log_hex("[acpi] flags=", madt->flags);
if (madt->flags & 1) {
g_log->info("[acpi] PCAT_COMPAT=1 (8259 PIC present)");
}
/* 枚举 MADT 子条目做汇总统计 */
const u8 *base = (const u8 *)madt;
u32 off = sizeof(acpi_madt);
u32 lapic_count = 0, ioapic_count = 0, iso_count = 0, nmi_count = 0;
while (off + 2 <= madt->hdr.length) {
const u8 *entry = base + off;
u8 type = entry[0];
u8 len = entry[1];
if (len < 2 || off + len > madt->hdr.length) break;
if (type == 0) lapic_count++;
else if (type == 1) ioapic_count++;
else if (type == 2) iso_count++;
else if (type == 3 || type == 4) nmi_count++;
off += len;
}
log_hex("[acpi] LAPIC entries=", lapic_count);
log_hex("[acpi] IOAPIC entries=", ioapic_count);
log_hex("[acpi] ISO entries=", iso_count);
log_hex("[acpi] NMI entries=", nmi_count);
}
/* ---------------------------------------------------------------
* Table enumeration
* --------------------------------------------------------------- */
@@ -241,6 +412,15 @@ static void acpi_enumerate_rsdt(const acpi_sdt_header *rsdt, u32 entry_size) {
g_log->info(sig);
log_hex("[acpi] addr=", addr);
log_hex("[acpi] len =", (u64)hdr->length);
/* 对关键表做详细解析 */
if (sig[0]=='A' && sig[1]=='P' && sig[2]=='I' && sig[3]=='C') {
acpi_parse_madt(hdr);
} else if (sig[0]=='M' && sig[1]=='C' && sig[2]=='F' && sig[3]=='G') {
acpi_parse_mcfg(hdr);
} else if (sig[0]=='H' && sig[1]=='P' && sig[2]=='E' && sig[3]=='T') {
acpi_parse_hpet(hdr);
}
}
}