2020-02-02 13:33:57 +01:00
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//----------------------------------------------------------------------------//
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// GNU GPL OS/K //
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// //
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// Desc: ACPI, Hardware detection related functions //
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// //
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// //
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// Copyright © 2018-2019 The OS/K Team //
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// //
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// This file is part of OS/K. //
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// //
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// OS/K is free software: you can redistribute it and/or modify //
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// it under the terms of the GNU General Public License as published by //
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// the Free Software Foundation, either version 3 of the License, or //
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// any later version. //
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// //
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// OS/K is distributed in the hope that it will be useful, //
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// but WITHOUT ANY WARRANTY//without even the implied warranty of //
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the //
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// GNU General Public License for more details. //
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// //
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// You should have received a copy of the GNU General Public License //
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// along with OS/K. If not, see <https://www.gnu.org/licenses/>. //
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//----------------------------------------------------------------------------//
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#include <init/boot.h>
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#include <io/vga.h>
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2020-02-03 11:58:34 +01:00
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#include <io/acpi.h>
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2020-02-02 13:33:57 +01:00
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void IoTestAcpi(void)
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{
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if (BtFirmwareInfo.romValid)
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KernLog("\tRom Table is valid at %p\n", BtFirmwareInfo.romTable);
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if (BtFirmwareInfo.apmValid)
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KernLog("\tApm Table is valid at %p\n", BtFirmwareInfo.apmTable);
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2020-02-03 11:58:34 +01:00
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RSDPDescriptor *rsdp = IoFindRSDP();
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if (!rsdp)
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return;
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KernLog("\tFound ACPI RSDP (%s) version %d at %p\n",
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rsdp->OEMID, (uint)rsdp->revision, rsdp
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);
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2020-02-02 13:33:57 +01:00
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return;
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}
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2020-02-03 11:58:34 +01:00
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RSDPDescriptor *IoFindRSDP()
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{
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char *rsdp = NULL;
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// Search in EBDA
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for (rsdp = (char *)0x00080000; // EBDA address
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(ulong)rsdp < (ulong)0x0009FFFF; // EBDA end
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rsdp++) {
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if (rsdp[0] == 'R' &&
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rsdp[1] == 'S' &&
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rsdp[2] == 'D' &&
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rsdp[3] == ' ' &&
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rsdp[4] == 'P' &&
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rsdp[5] == 'T' &&
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rsdp[6] == 'R' &&
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rsdp[7] == ' '
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) {
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return (RSDPDescriptor *)rsdp;
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}
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}
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// Search in BDA
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for (rsdp = (char *)0x000E0000; // BDA address
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(ulong)rsdp < (ulong)0x000FFFFF; // BDA end
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rsdp++) {
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if (rsdp[0] == 'R' &&
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rsdp[1] == 'S' &&
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rsdp[2] == 'D' &&
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rsdp[3] == ' ' &&
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rsdp[4] == 'P' &&
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rsdp[5] == 'T' &&
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rsdp[6] == 'R' &&
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rsdp[7] == ' '
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) {
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return (RSDPDescriptor *)rsdp;
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}
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}
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return NULL;
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}
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