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Commit 671eef85 authored Aug 20, 2008 by Cihula, Joseph Committed by Ingo Molnar Aug 21, 2008

x86, e820: add support for AddressRangeUnusuable ACPI memory type



Add support for the E820_UNUSABLE memory type, which is defined in
Revision 3.0b (Oct.  10, 2006) of the ACPI Specification on p.  394 Table
14-1:

  AddressRangeUnusuable This range of address contains memory in which
  errors have been detected.  This range must not be used by the OSPM.

Signed-off-by: Joseph Cihula <joseph.cihula@intel.com>
Signed-off-by: Shane Wang <shane.wang@intel.com>
Signed-off-by: Gang Wei <gang.wei@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

parent b76d69ed

arch/x86/kernel/e820.c

+4 −0

Original line number	Original line	Diff line number	Diff line
	@@ -148,6 +148,9 @@ void __init e820_print_map(char *who)
	case E820_NVS:		case E820_NVS:
	printk(KERN_CONT "(ACPI NVS)\n");		printk(KERN_CONT "(ACPI NVS)\n");
	break;		break;
			case E820_UNUSABLE:
			printk("(unusable)\n");
			break;
	default:		default:
	printk(KERN_CONT "type %u\n", e820.map[i].type);		printk(KERN_CONT "type %u\n", e820.map[i].type);
	break;		break;
	@@ -1260,6 +1263,7 @@ static inline const char *e820_type_to_string(int e820_type)
	case E820_RAM: return "System RAM";		case E820_RAM: return "System RAM";
	case E820_ACPI: return "ACPI Tables";		case E820_ACPI: return "ACPI Tables";
	case E820_NVS: return "ACPI Non-volatile Storage";		case E820_NVS: return "ACPI Non-volatile Storage";
			case E820_UNUSABLE: return "Unusable memory";
	default: return "reserved";		default: return "reserved";
	}		}
	}		}

include/asm-x86/e820.h

+1 −0

Original line number	Original line	Diff line number	Diff line
	@@ -43,6 +43,7 @@
	#define E820_RESERVED 2		#define E820_RESERVED 2
	#define E820_ACPI 3		#define E820_ACPI 3
	#define E820_NVS 4		#define E820_NVS 4
			#define E820_UNUSABLE 5

	/* reserved RAM used by kernel itself */		/* reserved RAM used by kernel itself */
	#define E820_RESERVED_KERN 128		#define E820_RESERVED_KERN 128