1 /*
2 * Copyright 2019-2022 Haiku, Inc. All rights reserved.
3 * Released under the terms of the MIT License.
4 */
5
6 #include "string.h"
7
8 #include <boot/platform.h>
9 #include <boot/stage2.h>
10 #include <arch_acpi.h>
11
12 #include "serial.h"
13 #include "acpi.h"
14
15 #include <arch/arm/arch_uart_pl011.h>
16 #include <arch/generic/debug_uart_8250.h>
17
18
arch_acpi_get_uart_pl011(const uart_info & uart)19 static void arch_acpi_get_uart_pl011(const uart_info &uart)
20 {
21 static char sUART[sizeof(ArchUARTPL011)];
22 gUART = new(sUART) ArchUARTPL011(uart.regs.start,
23 uart.clock != 0 ? uart.clock : 0x16e3600);
24 }
25
26
27 void
arch_handle_acpi()28 arch_handle_acpi()
29 {
30 acpi_spcr *spcr = (acpi_spcr*)acpi_find_table(ACPI_SPCR_SIGNATURE);
31 if (spcr != NULL) {
32 uart_info &uart = gKernelArgs.arch_args.uart;
33
34 if (spcr->interface_type == ACPI_SPCR_INTERFACE_TYPE_PL011) {
35 strcpy(uart.kind, UART_KIND_PL011);
36 } else if (spcr->interface_type == ACPI_SPCR_INTERFACE_TYPE_16550) {
37 strcpy(uart.kind, UART_KIND_8250);
38 }
39
40 uart.regs.start = spcr->base_address.address;
41 uart.regs.size = B_PAGE_SIZE;
42 uart.irq = spcr->gisv;
43 uart.clock = spcr->clock;
44
45 if (spcr->interface_type == ACPI_SPCR_INTERFACE_TYPE_PL011) {
46 arch_acpi_get_uart_pl011(uart);
47 }
48
49 dprintf("discovered uart from acpi: base=%lx, irq=%u, clock=%lu\n",
50 uart.regs.start, uart.irq, uart.clock);
51 }
52
53 acpi_madt *madt = (acpi_madt*)acpi_find_table(ACPI_MADT_SIGNATURE);
54 if (madt != NULL) {
55 uint64 gicc_base = 0;
56 uint64 gicd_base = 0;
57 uint8 version = 0;
58
59 acpi_apic *desc = (acpi_apic*)(madt + 1);
60 while (desc != (acpi_apic*)((char*)madt + madt->header.length)) {
61 if (desc->type == ACPI_MADT_GIC_INTERFACE) {
62 acpi_gic_interface *acpi_gicc = (acpi_gic_interface*)desc;
63 if (acpi_gicc->cpu_interface_num == 0)
64 gicc_base = acpi_gicc->base_address;
65 } else if (desc->type == ACPI_MADT_GIC_DISTRIBUTOR) {
66 acpi_gic_distributor *acpi_gicd = (acpi_gic_distributor*)desc;
67 gicd_base = acpi_gicd->base_address;
68 version = acpi_gicd->gic_version;
69 }
70 desc = (acpi_apic*)((char*)desc + desc->length);
71 }
72
73 if (version == 2 && gicc_base != 0 && gicd_base != 0) {
74 intc_info &intc = gKernelArgs.arch_args.interrupt_controller;
75 strcpy(intc.kind, INTC_KIND_GICV2);
76 intc.regs1.start = gicd_base;
77 intc.regs2.start = gicc_base;
78
79 dprintf("discovered gic from acpi: version=%d, gicd=%lx, gicc=%lx\n",
80 version, gicd_base, gicc_base);
81 }
82 }
83 }
84