BCOS 80x86 Include FilesProject Map
Physical Address Space Map (PASM)
File: 80x86/inc/kernel/pasm.inc
 

Copyright © Brendan Trotter 2008

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PASM Entry Format

 8: struc PASM_ENTRY
 9:       .baseAddress:                 resd 2            ;64-bit base address of range
10:       .length:                      resd 2            ;64-bit length of range in bytes
11:       .type:                        resd 1            ;Range type (as defined by ACPI specifications)
12:       .flags:                       resd 1            ;Range flags (as defined by ACPI specifications)
13:       .domain:                      resd 1            ;NUMA domain for area
14:                                     resd 1            ;Unused (padding)
15: endstruc
16: 
17: %define PASMTYPE_unknown            0x00000000        ;Unknown area
18: %define PASMTYPE_RAM                0x00000001        ;Usable RAM
19: %define PASMTYPE_system             0x00000002        ;Reserved (e.g. system ROM, memory-mapped device)
20: %define PASMTYPE_ACPIreclaim        0x00000003        ;ACPI reclaimable memory (usable by OS after reading ACPI tables)
21: %define PASMTYPE_ACPINVS            0x00000004        ;ACPI NVS memory
22: %define PASMTYPE_faulty             0x00000005        ;Unusable/faulty RAM
23: %define PASMTYPE_BIOSreclaim        0x00000006        ;BIOS reclaimable memory (usable by OS after entering stage 2)
24: %define PASMTYPE_mixed              0x00000007        ;Mixed (reported as different types by firmware)
25: 
26: %define MAX_KNOWN_PASMTYPE          PASMTYPE_faulty   ;Maximum PASM type accepted from firmware (higher numbers used internally only)
27: %define MAX_USED_PASMTYPE           PASMTYPE_mixed    ;Maximum PASM type used by the OS
28: 
29: 
30: %define PASMFLG_invalid             0x00000001        ;Valid entry (only used by boot loaders, invalid entries aren't inserted in the PASM list)
31: %define PASMFLG_nonVolatile         0x00000002        ;Non-volatile area (from memory detection or SRAT)
32: %define PASMFLG_hotPlug             0x80000000        ;Hot-pluggable area (from SRAT)


PASM Detection Methods

38: %define PASMDETECT_unknown                0x00        ;Unknown
39: %define PASMDETECT_probing                0x01        ;Manual probing
40: %define PASMDETECT_CMOS                   0x02        ;CMOS locations 0x17 and 0x18
41: %define PASMDETECT_CMOS_probe16MB         0x03        ;CMOS locations 0x17 and 0x18 with probing above 16 MiB
42: %define PASMDETECT_CMOS_probe64MB         0x04        ;CMOS locations 0x17 and 0x18 with probing above 64 MiB
43: %define PASMDETECT_int15_88               0x05        ;BIOS interrupt 0x15 (AH=0x88)
44: %define PASMDETECT_int15_88_probe16MB     0x06        ;BIOS interrupt 0x15 (AH=0x88) with probing above 16 MiB
45: %define PASMDETECT_int15_88_probe64MB     0x07        ;BIOS interrupt 0x15 (AH=0x88) with probing above 64 MiB
46: %define PASMDETECT_int15_DA88             0x08        ;BIOS interrupt 0x15 (AX=0xDA88)
47: %define PASMDETECT_int15_DA88_probe16MB   0x09        ;BIOS interrupt 0x15 (AX=0xDA88) with probing above 16 MiB
48: %define PASMDETECT_int15_8A               0x0A        ;BIOS interrupt 0x15 (AH=0x8A)
49: %define PASMDETECT_int15_8A_probe16MB     0x0B        ;BIOS interrupt 0x15 (AH=0x8A) with probing above 16 MiB
50: %define PASMDETECT_int15_C7               0x0C        ;BIOS interrupt 0x15 (AH=0xC7)
51: %define PASMDETECT_int15_E801             0x0D        ;BIOS interrupt 0x15 (AX=0xE801)
52: %define PASMDETECT_int15_E802             0x0E        ;BIOS interrupt 0x15 (AX=0xE802) **unused due to lack of information**
53: %define PASMDETECT_int15_E881             0x0F        ;BIOS interrupt 0x15 (AX=0xE881)
54: %define PASMDETECT_int15_E820             0x10        ;BIOS interrupt 0x15 (EAX=0xE820)
55: %define PASMDETECT_int15_E820_ACPI3       0x11        ;BIOS interrupt 0x15 (EAX=0xE820, ACPI 3.0)
56: %define PASMDETECT_embedded               0x12        ;From embedded ROM

Generated on Mon Oct 12 01:17:24 2009