acpi_table.c revision 1.1.2.2
1 1.1.2.2 pgoyette /* $NetBSD: acpi_table.c,v 1.1.2.2 2018/10/20 06:58:24 pgoyette Exp $ */ 2 1.1.2.2 pgoyette 3 1.1.2.2 pgoyette /*- 4 1.1.2.2 pgoyette * Copyright (c) 2018 The NetBSD Foundation, Inc. 5 1.1.2.2 pgoyette * All rights reserved. 6 1.1.2.2 pgoyette * 7 1.1.2.2 pgoyette * This code is derived from software contributed to The NetBSD Foundation 8 1.1.2.2 pgoyette * by Jared McNeill <jmcneill (at) invisible.ca>. 9 1.1.2.2 pgoyette * 10 1.1.2.2 pgoyette * Redistribution and use in source and binary forms, with or without 11 1.1.2.2 pgoyette * modification, are permitted provided that the following conditions 12 1.1.2.2 pgoyette * are met: 13 1.1.2.2 pgoyette * 1. Redistributions of source code must retain the above copyright 14 1.1.2.2 pgoyette * notice, this list of conditions and the following disclaimer. 15 1.1.2.2 pgoyette * 2. Redistributions in binary form must reproduce the above copyright 16 1.1.2.2 pgoyette * notice, this list of conditions and the following disclaimer in the 17 1.1.2.2 pgoyette * documentation and/or other materials provided with the distribution. 18 1.1.2.2 pgoyette * 19 1.1.2.2 pgoyette * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 1.1.2.2 pgoyette * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 1.1.2.2 pgoyette * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 1.1.2.2 pgoyette * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 1.1.2.2 pgoyette * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 1.1.2.2 pgoyette * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 1.1.2.2 pgoyette * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 1.1.2.2 pgoyette * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 1.1.2.2 pgoyette * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 1.1.2.2 pgoyette * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 1.1.2.2 pgoyette * POSSIBILITY OF SUCH DAMAGE. 30 1.1.2.2 pgoyette */ 31 1.1.2.2 pgoyette 32 1.1.2.2 pgoyette /* 33 1.1.2.2 pgoyette * ACPI table functions for use in early boot before ACPICA can be safely 34 1.1.2.2 pgoyette * initialized. 35 1.1.2.2 pgoyette */ 36 1.1.2.2 pgoyette 37 1.1.2.2 pgoyette #include <sys/cdefs.h> 38 1.1.2.2 pgoyette __KERNEL_RCSID(0, "$NetBSD: acpi_table.c,v 1.1.2.2 2018/10/20 06:58:24 pgoyette Exp $"); 39 1.1.2.2 pgoyette 40 1.1.2.2 pgoyette #include <sys/param.h> 41 1.1.2.2 pgoyette #include <sys/bus.h> 42 1.1.2.2 pgoyette #include <sys/cpu.h> 43 1.1.2.2 pgoyette #include <sys/device.h> 44 1.1.2.2 pgoyette 45 1.1.2.2 pgoyette #include <uvm/uvm_extern.h> 46 1.1.2.2 pgoyette 47 1.1.2.2 pgoyette #include <dev/acpi/acpireg.h> 48 1.1.2.2 pgoyette #include <dev/acpi/acpivar.h> 49 1.1.2.2 pgoyette 50 1.1.2.2 pgoyette #include <machine/acpi_machdep.h> 51 1.1.2.2 pgoyette 52 1.1.2.2 pgoyette #include <arch/arm/acpi/acpi_table.h> 53 1.1.2.2 pgoyette 54 1.1.2.2 pgoyette ACPI_STATUS 55 1.1.2.2 pgoyette acpi_table_map(ACPI_PHYSICAL_ADDRESS pa, void **hdrp) 56 1.1.2.2 pgoyette { 57 1.1.2.2 pgoyette ACPI_TABLE_HEADER *header; 58 1.1.2.2 pgoyette ACPI_STATUS rv; 59 1.1.2.2 pgoyette UINT32 length; 60 1.1.2.2 pgoyette 61 1.1.2.2 pgoyette rv = acpi_md_OsMapMemory(pa, sizeof(*header), (void **)&header); 62 1.1.2.2 pgoyette if (ACPI_FAILURE(rv)) 63 1.1.2.2 pgoyette return rv; 64 1.1.2.2 pgoyette length = header->Length; 65 1.1.2.2 pgoyette acpi_md_OsUnmapMemory(header, sizeof(*header)); 66 1.1.2.2 pgoyette 67 1.1.2.2 pgoyette return acpi_md_OsMapMemory(pa, length, hdrp); 68 1.1.2.2 pgoyette } 69 1.1.2.2 pgoyette 70 1.1.2.2 pgoyette void 71 1.1.2.2 pgoyette acpi_table_unmap(ACPI_TABLE_HEADER *hdrp) 72 1.1.2.2 pgoyette { 73 1.1.2.2 pgoyette acpi_md_OsUnmapMemory(hdrp, hdrp->Length); 74 1.1.2.2 pgoyette } 75 1.1.2.2 pgoyette 76 1.1.2.2 pgoyette ACPI_STATUS 77 1.1.2.2 pgoyette acpi_table_find(const char *sig, void **hdrp) 78 1.1.2.2 pgoyette { 79 1.1.2.2 pgoyette ACPI_TABLE_RSDP *rsdp; 80 1.1.2.2 pgoyette ACPI_TABLE_XSDT *xsdt; 81 1.1.2.2 pgoyette ACPI_TABLE_HEADER *header; 82 1.1.2.2 pgoyette ACPI_PHYSICAL_ADDRESS pa; 83 1.1.2.2 pgoyette ACPI_STATUS rv; 84 1.1.2.2 pgoyette 85 1.1.2.2 pgoyette /* RDSP contains a pointer to the XSDT */ 86 1.1.2.2 pgoyette pa = 0; 87 1.1.2.2 pgoyette rv = acpi_md_OsMapMemory(acpi_md_OsGetRootPointer(), sizeof(*rsdp), (void **)&rsdp); 88 1.1.2.2 pgoyette if (ACPI_FAILURE(rv)) 89 1.1.2.2 pgoyette return rv; 90 1.1.2.2 pgoyette if (memcmp(rsdp->Signature, ACPI_SIG_RSDP, sizeof(rsdp->Signature)) == 0) 91 1.1.2.2 pgoyette pa = rsdp->XsdtPhysicalAddress; 92 1.1.2.2 pgoyette acpi_md_OsUnmapMemory(rsdp, sizeof(*rsdp)); 93 1.1.2.2 pgoyette if (pa == 0) 94 1.1.2.2 pgoyette return AE_NOT_FOUND; 95 1.1.2.2 pgoyette 96 1.1.2.2 pgoyette /* XSDT contains pointers to other tables */ 97 1.1.2.2 pgoyette rv = acpi_table_map(pa, (void **)&xsdt); 98 1.1.2.2 pgoyette if (ACPI_FAILURE(rv)) 99 1.1.2.2 pgoyette return rv; 100 1.1.2.2 pgoyette const u_int entries = (xsdt->Header.Length - sizeof(ACPI_TABLE_HEADER)) / ACPI_XSDT_ENTRY_SIZE; 101 1.1.2.2 pgoyette for (u_int n = 0; n < entries; n++) { 102 1.1.2.2 pgoyette rv = acpi_table_map(xsdt->TableOffsetEntry[n], (void **)&header); 103 1.1.2.2 pgoyette if (ACPI_FAILURE(rv)) 104 1.1.2.2 pgoyette continue; 105 1.1.2.2 pgoyette if (memcmp(header->Signature, sig, sizeof(header->Signature)) == 0) { 106 1.1.2.2 pgoyette acpi_table_unmap((ACPI_TABLE_HEADER *)xsdt); 107 1.1.2.2 pgoyette *hdrp = header; 108 1.1.2.2 pgoyette return AE_OK; 109 1.1.2.2 pgoyette } 110 1.1.2.2 pgoyette } 111 1.1.2.2 pgoyette 112 1.1.2.2 pgoyette /* Not found */ 113 1.1.2.2 pgoyette acpi_table_unmap((ACPI_TABLE_HEADER *)xsdt); 114 1.1.2.2 pgoyette return AE_NOT_FOUND; 115 1.1.2.2 pgoyette } 116
Indexes created Thu Oct 02 07:10:07 GMT 2025