[PATCH] On a SGI Octane not all ARCS Memory if freed for kernel use

[Johannes Dickgreber <tanzy@gmx.de>]

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Hi

Only tested on a SGI Octane, i dont know if it works on
JAZZ SNI_RM or SGI O2.

It frees only 60KB.

There is an ARCMemoryRegisterDump in the attached file.

Signed-off-by: Johannes Dickgreber tanzy@gmx.de
---
On a SGI Octane not all ARCS Memory is freed for kernel use


--- linux-2.6.22.6/arch/mips/arc/memory.c	2007-07-09 01:32:17 +0200
+++ linux-octane-2/arch/mips/arc/memory.c	2007-10-06 22:04:07 +0200
@@ -70,11 +70,11 @@ static inline int memtype_classify_arcs 
 	case arcs_free:
 		return BOOT_MEM_RAM;
 	case arcs_atmp:
+	case arcs_prog:
 		return BOOT_MEM_ROM_DATA;
 	case arcs_eblock:
 	case arcs_rvpage:
 	case arcs_bmem:
-	case arcs_prog:
 	case arcs_aperm:
 		return BOOT_MEM_RESERVED;
 	default:
@@ -90,11 +90,11 @@ static inline int memtype_classify_arc (
 	case arc_fcontig:
 		return BOOT_MEM_RAM;
 	case arc_atmp:
+	case arc_prog:
 		return BOOT_MEM_ROM_DATA;
 	case arc_eblock:
 	case arc_rvpage:
 	case arc_bmem:
-	case arc_prog:
 	case arc_aperm:
 		return BOOT_MEM_RESERVED;
 	default:

[-- Attachment #2: ARC_MEMORY.msg --]
[-- Type: text/plain, Size: 2280 bytes --]

Oct  5 13:57:31 racer Linux version 2.6.22-octane-2 (root@racer) (gcc version 4.1.1 (Gentoo 4.1.1-r3 p1.10)) #11 Fri Oct 5 13:54:52 CEST 2007
Oct  5 13:57:31 racer ARCH: SGI-IP30
Oct  5 13:57:31 racer PROMLIB: ARC firmware Version 64 Revision 0
Oct  5 13:57:31 racer ARCS MEMORY DESCRIPTOR dump:
Oct  5 13:57:31 racer [0,a800000020f32c90]: base<00000000> pages<00000001> type<Exception Block>
Oct  5 13:57:31 racer [1,a800000020f32d10]: base<00000001> pages<00000001> type<ARCS Romvec Page>
Oct  5 13:57:31 racer [2,a800000020f32cd0]: base<00000002> pages<00000002> type<ARCS Permanent Storage Area>
Oct  5 13:57:31 racer [3,a800000020f32a10]: base<00020004> pages<00000efc> type<Generic Free RAM>
Oct  5 13:57:31 racer [4,a800000020f34a10]: base<00020f00> pages<00000100> type<ARCS Temp Storage Area>
Oct  5 13:57:31 racer [5,a800000020f349d0]: base<00021000> pages<0003eff0> type<Generic Free RAM>
Oct  5 13:57:31 racer [6,a800000020f34bd0]: base<0005fff0> pages<0000000f> type<Standalone Program Pages>
Oct  5 13:57:31 racer [7,a800000020f34b90]: base<0005ffff> pages<00000001> type<Generic Free RAM>
Oct  5 13:57:31 racer CPU revision is: 00000e23
Oct  5 13:57:31 racer FPU revision is: 00000900
Oct  5 13:57:31 racer Silicon Graphics Octane (IP30) support: (c) 2004-2007 Stanislaw Skowronek.
Oct  5 13:57:31 racer Detected 1024 MB of physical memory.
Oct  5 13:57:31 racer Determined physical RAM map:
Oct  5 13:57:31 racer memory: 0000000000004000 @ 0000000000000000 (reserved)
Oct  5 13:57:31 racer memory: 0000000000efc000 @ 0000000020004000 (usable)
Oct  5 13:57:31 racer memory: 0000000000100000 @ 0000000020f00000 (ROM data)
Oct  5 13:57:31 racer memory: 000000003eff0000 @ 0000000021000000 (usable)
Oct  5 13:57:31 racer memory: 000000000000f000 @ 000000005fff0000 (reserved)
Oct  5 13:57:31 racer memory: 0000000000001000 @ 000000005ffff000 (usable)
Oct  5 13:57:31 racer Wasting 7340256 bytes for tracking 131076 unused pages
Oct  5 13:57:31 racer On node 0 totalpages: 393216
Oct  5 13:57:31 racer DMA zone: 5376 pages used for memmap
Oct  5 13:57:31 racer DMA zone: 0 pages reserved
Oct  5 13:57:31 racer DMA zone: 387840 pages, LIFO batch:31
Oct  5 13:57:31 racer Normal zone: 0 pages used for memmap
Oct  5 13:57:31 racer Built 1 zonelists.  Total pages: 387840