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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>
hifive-unleashed-5.1
Cihula, Joseph 2008-08-20 16:43:07 -07:00 committed by Ingo Molnar
parent b76d69ed72
commit 671eef85a3
2 changed files with 5 additions and 0 deletions
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4
arch/x86/kernel/e820.c
View File

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

1
include/asm-x86/e820.h
View File

@ -43,6 +43,7 @@
#define E820_RESERVED 2
#define E820_ACPI 3
#define E820_NVS 4
#define E820_UNUSABLE 5
/* reserved RAM used by kernel itself */
#define E820_RESERVED_KERN 128