#include <ipxe/api.h>
#include <config/general.h>
+/** An ACPI small resource descriptor header */
+struct acpi_small_resource {
+ /** Tag byte */
+ uint8_t tag;
+} __attribute__ (( packed ));
+
+/** ACPI small resource length mask */
+#define ACPI_SMALL_LEN_MASK 0x03
+
+/** An ACPI end resource descriptor */
+#define ACPI_END_RESOURCE 0x78
+
+/** An ACPI end resource descriptor */
+struct acpi_end_resource {
+ /** Header */
+ struct acpi_small_resource hdr;
+ /** Checksum */
+ uint8_t checksum;
+} __attribute__ (( packed ));
+
+/** An ACPI large resource descriptor header */
+struct acpi_large_resource {
+ /** Tag byte */
+ uint8_t tag;
+ /** Length of data items */
+ uint16_t len;
+} __attribute__ (( packed ));
+
+/** ACPI large resource flag */
+#define ACPI_LARGE 0x80
+
+/** An ACPI QWORD address space resource descriptor */
+#define ACPI_QWORD_ADDRESS_SPACE_RESOURCE 0x8a
+
+/** An ACPI QWORD address space resource descriptor */
+struct acpi_qword_address_space_resource {
+ /** Header */
+ struct acpi_large_resource hdr;
+ /** Resource type */
+ uint8_t type;
+ /** General flags */
+ uint8_t general;
+ /** Type-specific flags */
+ uint8_t specific;
+ /** Granularity */
+ uint64_t granularity;
+ /** Minimum address */
+ uint64_t min;
+ /** Maximum address */
+ uint64_t max;
+ /** Translation offset */
+ uint64_t offset;
+ /** Length */
+ uint64_t len;
+} __attribute__ (( packed ));
+
+/** A memory address space type */
+#define ACPI_ADDRESS_TYPE_MEM 0x00
+
+/** An ACPI resource descriptor */
+union acpi_resource {
+ /** Tag byte */
+ uint8_t tag;
+ /** Small resource descriptor */
+ struct acpi_small_resource small;
+ /** End resource descriptor */
+ struct acpi_end_resource end;
+ /** Large resource descriptor */
+ struct acpi_large_resource large;
+ /** QWORD address space resource descriptor */
+ struct acpi_qword_address_space_resource qword;
+};
+
+/**
+ * Get ACPI resource tag
+ *
+ * @v res ACPI resource descriptor
+ * @ret tag Resource tag
+ */
+static inline unsigned int acpi_resource_tag ( union acpi_resource *res ) {
+
+ return ( ( res->tag & ACPI_LARGE ) ?
+ res->tag : ( res->tag & ~ACPI_SMALL_LEN_MASK ) );
+}
+
+/**
+ * Get length of ACPI small resource descriptor
+ *
+ * @v res Small resource descriptor
+ * @ret len Length of descriptor
+ */
+static inline size_t acpi_small_len ( struct acpi_small_resource *res ) {
+
+ return ( sizeof ( *res ) + ( res->tag & ACPI_SMALL_LEN_MASK ) );
+}
+
+/**
+ * Get length of ACPI large resource descriptor
+ *
+ * @v res Large resource descriptor
+ * @ret len Length of descriptor
+ */
+static inline size_t acpi_large_len ( struct acpi_large_resource *res ) {
+
+ return ( sizeof ( *res ) + le16_to_cpu ( res->len ) );
+}
+
+/**
+ * Get length of ACPI resource descriptor
+ *
+ * @v res ACPI resource descriptor
+ * @ret len Length of descriptor
+ */
+static inline size_t acpi_resource_len ( union acpi_resource *res ) {
+
+ return ( ( res->tag & ACPI_LARGE ) ?
+ acpi_large_len ( &res->large ) :
+ acpi_small_len ( &res->small ) );
+}
+
+/**
+ * Get next ACPI resource descriptor
+ *
+ * @v res ACPI resource descriptor
+ * @ret next Next ACPI resource descriptor
+ */
+static inline union acpi_resource *
+acpi_resource_next ( union acpi_resource *res ) {
+
+ return ( ( ( void * ) res ) + acpi_resource_len ( res ) );
+}
+
/**
* An ACPI description header
*
value );
}
-/**
- * Map PCI bus address as an I/O address
- *
- * @v bus_addr PCI bus address
- * @v len Length of region
- * @ret io_addr I/O address, or NULL on error
- */
-static inline __always_inline void *
-PCIAPI_INLINE ( efi, pci_ioremap ) ( struct pci_device *pci __unused,
- unsigned long bus_addr, size_t len ) {
- return ioremap ( bus_addr, len );
-}
-
#endif /* _IPXE_EFI_PCI_API_H */
#include <stdlib.h>
#include <errno.h>
#include <ipxe/pci.h>
+#include <ipxe/acpi.h>
#include <ipxe/efi/efi.h>
#include <ipxe/efi/efi_pci.h>
#include <ipxe/efi/efi_driver.h>
return rc;
}
+/**
+ * Map PCI bus address as an I/O address
+ *
+ * @v bus_addr PCI bus address
+ * @v len Length of region
+ * @ret io_addr I/O address, or NULL on error
+ */
+void * efipci_ioremap ( struct pci_device *pci, unsigned long bus_addr,
+ size_t len ) {
+ union {
+ union acpi_resource *res;
+ void *raw;
+ } u;
+ EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *root;
+ EFI_HANDLE handle;
+ unsigned int tag;
+ uint64_t offset;
+ uint64_t start;
+ uint64_t end;
+ void *io_addr = NULL;
+ EFI_STATUS efirc;
+ int rc;
+
+ /* Open root bridge */
+ if ( ( rc = efipci_root_open ( pci, &handle, &root ) ) != 0 )
+ goto err_root;
+
+ /* Get ACPI resource descriptors */
+ if ( ( efirc = root->Configuration ( root, &u.raw ) ) != 0 ) {
+ rc = -EEFI ( efirc );
+ DBGC ( pci, "EFIPCI " PCI_FMT " cannot get configuration: "
+ "%s\n", PCI_ARGS ( pci ), strerror ( rc ) );
+ goto err_config;
+ }
+
+ /* Parse resource descriptors */
+ for ( ; ( ( tag = acpi_resource_tag ( u.res ) ) != ACPI_END_RESOURCE ) ;
+ u.res = acpi_resource_next ( u.res ) ) {
+
+ /* Ignore anything other than an address space descriptor */
+ if ( tag != ACPI_QWORD_ADDRESS_SPACE_RESOURCE )
+ continue;
+
+ /* Ignore descriptors that do not cover this memory range */
+ if ( u.res->qword.type != ACPI_ADDRESS_TYPE_MEM )
+ continue;
+ offset = le64_to_cpu ( u.res->qword.offset );
+ start = ( offset + le64_to_cpu ( u.res->qword.min ) );
+ end = ( start + le64_to_cpu ( u.res->qword.len ) );
+ if ( ( bus_addr < start ) || ( ( bus_addr + len ) > end ) )
+ continue;
+
+ /* Use this address space descriptor */
+ DBGC2 ( pci, "EFIPCI " PCI_FMT " %08lx+%zx -> ",
+ PCI_ARGS ( pci ), bus_addr, len );
+ bus_addr -= offset;
+ DBGC2 ( pci, "%08lx\n", bus_addr );
+ io_addr = ioremap ( bus_addr, len );
+ break;
+ }
+ if ( ! io_addr ) {
+ DBGC ( pci, "EFIPCI " PCI_FMT " %08lx+%zx is not within "
+ "root bridge address space\n",
+ PCI_ARGS ( pci ), bus_addr, len );
+ }
+
+ err_config:
+ efipci_root_close ( handle );
+ err_root:
+ return io_addr;
+}
+
PROVIDE_PCIAPI_INLINE ( efi, pci_num_bus );
PROVIDE_PCIAPI_INLINE ( efi, pci_read_config_byte );
PROVIDE_PCIAPI_INLINE ( efi, pci_read_config_word );
PROVIDE_PCIAPI_INLINE ( efi, pci_write_config_byte );
PROVIDE_PCIAPI_INLINE ( efi, pci_write_config_word );
PROVIDE_PCIAPI_INLINE ( efi, pci_write_config_dword );
-PROVIDE_PCIAPI_INLINE ( efi, pci_ioremap );
+PROVIDE_PCIAPI ( efi, pci_ioremap, efipci_ioremap );
/******************************************************************************
*
projects / thirdparty / ipxe.git / commitdiff
