86 lines
2.2 KiB
C
86 lines
2.2 KiB
C
#define _SYSTEM
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#include <errno.h>
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#include <string.h>
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#include <minix/acpi.h>
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#include <minix/com.h>
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#include <minix/ds.h>
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#include <minix/ipc.h>
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#include <minix/log.h>
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#include <minix/sysutil.h>
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static struct log log =
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{ .name = "libacpi", .log_level = LEVEL_TRACE, .log_func = default_log };
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static endpoint_t acpi_ep = NONE;
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int
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acpi_init(void)
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{
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int res;
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res = ds_retrieve_label_endpt("acpi", &acpi_ep);
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return res;
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}
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/*===========================================================================*
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* IRQ handling *
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*===========================================================================*/
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int
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acpi_get_irq(unsigned bus, unsigned dev, unsigned pin)
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{
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int err;
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message m;
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if (acpi_ep == NONE) {
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err = acpi_init();
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if (OK != err) {
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panic("libacpi: ds_retrieve_label_endpt failed for 'acpi': %d", err);
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}
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else {
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log_info(&log, "resolved acpi to endpoint: %d\n", acpi_ep);
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}
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}
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((struct acpi_get_irq_req *)&m)->hdr.request = ACPI_REQ_GET_IRQ;
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((struct acpi_get_irq_req *)&m)->bus = bus;
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((struct acpi_get_irq_req *)&m)->dev = dev;
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((struct acpi_get_irq_req *)&m)->pin = pin;
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if ((err = ipc_sendrec(acpi_ep, &m)) != OK)
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panic("libacpi: error %d while receiving from ACPI\n", err);
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return ((struct acpi_get_irq_resp *)&m)->irq;
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}
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/*
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* tells acpi which two busses are connected by this bridge. The primary bus
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* (pbnr) must be already known to acpi and it must map dev as the connection to
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* the secondary (sbnr) bus
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*/
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void
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acpi_map_bridge(unsigned int pbnr, unsigned int dev, unsigned int sbnr)
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{
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int err;
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message m;
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if (acpi_ep == NONE) {
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err = acpi_init();
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if (OK != err) {
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panic("libacpi: ds_retrieve_label_endpt failed for 'acpi': %d", err);
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}
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}
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((struct acpi_map_bridge_req *)&m)->hdr.request = ACPI_REQ_MAP_BRIDGE;
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((struct acpi_map_bridge_req *)&m)->primary_bus = pbnr;
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((struct acpi_map_bridge_req *)&m)->secondary_bus = sbnr;
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((struct acpi_map_bridge_req *)&m)->device = dev;
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if ((err = ipc_sendrec(acpi_ep, &m)) != OK)
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panic("libacpi: error %d while receiving from ACPI\n", err);
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if (((struct acpi_map_bridge_resp *)&m)->err != OK)
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printf("libacpi: acpi failed to map pci (%d) to pci (%d) bridge\n",
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pbnr, sbnr);
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}
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