40bfed28cd
- every pci device which implements _PRT acpi method is considered to be a pci-to-pci bridge - acpi driver constructs a hierarchy of pci-to-pci bridges - when pci driver identifies a pci-to-pci bridge it tells acpi driver what is the primary and the secondary bus for this device - when pci requests IRQ routing information from acpi, it passes the bus number too to be able to identify the device accurately
158 lines
3.1 KiB
C
158 lines
3.1 KiB
C
#include <minix/driver.h>
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#include <acpi.h>
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#include <assert.h>
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#include <minix/acpi.h>
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#include "pci.h"
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PUBLIC int acpi_enabled;
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PUBLIC struct machine machine;
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/* don't know where ACPI tables are, we may need to access any memory */
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PRIVATE int init_mem_priv(void)
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{
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struct mem_range mr;
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mr.mr_base = 0;
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mr.mr_limit = 0xffffffff;
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return sys_privctl(SELF, SYS_PRIV_ADD_MEM, &mr);
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}
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PRIVATE void set_machine_mode(void)
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{
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ACPI_OBJECT arg1;
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ACPI_OBJECT_LIST args;
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ACPI_STATUS as;
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arg1.Type = ACPI_TYPE_INTEGER;
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arg1.Integer.Value = machine.apic_enabled ? 1 : 0;
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args.Count = 1;
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args.Pointer = &arg1;
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as = AcpiEvaluateObject(ACPI_ROOT_OBJECT, "_PIC", &args, NULL);
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/*
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* We can silently ignore failure as it may not be implemented, ACPI should
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* provide us with correct information anyway
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*/
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if (ACPI_SUCCESS(as))
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printf("ACPI: machine set to %s mode\n",
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machine.apic_enabled ? "APIC" : "PIC");
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}
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PRIVATE ACPI_STATUS init_acpica(void)
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{
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ACPI_STATUS status;
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status = AcpiInitializeSubsystem();
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if (ACPI_FAILURE(status))
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return status;
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status = AcpiInitializeTables(NULL, 16, FALSE);
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if (ACPI_FAILURE(status))
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return status;
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status = AcpiLoadTables();
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if (ACPI_FAILURE(status))
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return status;
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status = AcpiEnableSubsystem(0);
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if (ACPI_FAILURE(status))
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return status;
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status = AcpiInitializeObjects(0);
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if (ACPI_FAILURE(status))
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return status;
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set_machine_mode();
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pci_scan_devices();
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return AE_OK;
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}
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PUBLIC void init_acpi(void)
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{
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ACPI_STATUS acpi_err;
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/* test conditions for acpi */
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if (sys_getmachine(&machine)) {
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printf("ACPI: no machine\n");
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return;
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}
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if (machine.acpi_rsdp == 0) {
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printf("ACPI: no RSDP\n");
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return;
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}
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if (init_mem_priv()) {
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printf("ACPI: no mem access\n");
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return;
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}
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if ((acpi_err = init_acpica()) == AE_OK) {
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acpi_enabled = 1;
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printf("ACPI: ACPI enabled\n");
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}
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else {
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acpi_enabled = 0;
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printf("ACPI: ACPI failed with err %d\n", acpi_err);
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}
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}
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PRIVATE int sef_cb_init_fresh(int type, sef_init_info_t *info)
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{
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init_acpi();
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return OK;
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}
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PRIVATE void sef_local_startup()
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{
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/* Register init callbacks. */
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sef_setcb_init_fresh(sef_cb_init_fresh);
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sef_setcb_init_lu(sef_cb_init_fresh);
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sef_setcb_init_restart(sef_cb_init_fresh);
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/* Register live update callbacks. */
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sef_setcb_lu_prepare(sef_cb_lu_prepare_always_ready);
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sef_setcb_lu_state_isvalid(sef_cb_lu_state_isvalid_standard);
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/* Let SEF perform startup. */
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sef_startup();
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}
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int main(void)
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{
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int err;
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message m;
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int ipc_status;
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sef_local_startup();
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for(;;) {
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err = driver_receive(ANY, &m, &ipc_status);
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if (err != OK) {
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printf("ACPI: driver_receive failed: %d\n", err);
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continue;
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}
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switch (((struct acpi_request_hdr *)&m)->request) {
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case ACPI_REQ_GET_IRQ:
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do_get_irq(&m);
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break;
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case ACPI_REQ_MAP_BRIDGE:
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do_map_bridge(&m);
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break;
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default:
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printf("ACPI: ignoring unsupported request %d "
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"from %d\n",
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((struct acpi_request_hdr *)&m)->request,
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((struct acpi_request_hdr *)&m)->m_source);
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}
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err = send(m.m_source, &m);
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if (err != OK) {
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printf("ACPI: send failed: %d\n", err);
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}
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}
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}
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