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
45 lines
880 B
C
45 lines
880 B
C
#include <minix/types.h>
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#include <minix/ipc.h>
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#define ACPI_REQ_GET_IRQ 1
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#define ACPI_REQ_MAP_BRIDGE 2
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struct acpi_request_hdr {
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endpoint_t m_source; /* message header */
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u32_t request;
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};
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/*
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* Message to request dev/pin translation to IRQ by acpi using the acpi routing
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* tables
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*/
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struct acpi_get_irq_req {
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struct acpi_request_hdr hdr;
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u32_t bus;
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u32_t dev;
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u32_t pin;
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u32_t __padding[4];
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};
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/* response from acpi to acpi_get_irq_req */
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struct acpi_get_irq_resp {
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endpoint_t m_source; /* message header */
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i32_t irq;
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u32_t __padding[7];
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};
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/* message format for pci bridge mappings to acpi */
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struct acpi_map_bridge_req {
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struct acpi_request_hdr hdr;
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u32_t primary_bus;
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u32_t secondary_bus;
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u32_t device;
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u32_t __padding[4];
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};
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struct acpi_map_bridge_resp {
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endpoint_t m_source; /* message header */
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int err;
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u32_t __padding[7];
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};
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