- add highmem patch from Zwane Mwaikambo
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Bryce Denney
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114
bochs/patches/patch.highmem
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114
bochs/patches/patch.highmem
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----------------------------------------------------------------------
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Patch name: patch.highmem
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Author: Zwane Mwaikambo <zwane@linuxpower.ca>
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Date: Tue, 24 Sep 2002 21:13:36 -0400 (EDT)
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Detailed description:
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This patch allows me to allocate upto 1G of memory, came very handy when i
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was doing highmem testing in a linux simulation. Yes the 1G stack
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allocation is ugly, but it isn't there for the common case (non debug).
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How does this perform on Windows? On my overcommit 2.4.19-pre5-ac3 box
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bochs starts much faster too.
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Patch was created with:
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cvs diff -u
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Apply patch to what version:
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cvs checked out on DATE, release version VER
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Instructions:
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To patch, go to main bochs directory.
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Type "patch -p1 < THIS_PATCH_FILE".
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----------------------------------------------------------------------
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From zwane@linuxpower.ca Wed Sep 25 09:30:05 2002
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Date: Tue, 24 Sep 2002 21:13:36 -0400 (EDT)
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From: Zwane Mwaikambo <zwane@linuxpower.ca>
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To: Bochs Devel <bochs-developers@lists.sourceforge.net>
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Subject: [Bochs-developers] [PATCH] bochs-highmem
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This patch allows me to allocate upto 1G of memory, came very handy when i
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was doing highmem testing in a linux simulation. Yes the 1G stack
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allocation is ugly, but it isn't there for the common case (non debug).
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How does this perform on Windows? On my overcommit 2.4.19-pre5-ac3 box
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bochs starts much faster too.
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Index: bochs-cvs/config.h.in
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===================================================================
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RCS file: /cvsroot/bochs/bochs/config.h.in,v
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retrieving revision 1.79
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diff -u -r1.79 config.h.in
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--- bochs-cvs/config.h.in 24 Sep 2002 20:01:56 -0000 1.79
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+++ bochs-cvs/config.h.in 25 Sep 2002 00:57:02 -0000
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@@ -287,7 +287,7 @@
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// is not used, and this section can be ignored.
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// =================================================================
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-#define BX_MAX_DIRTY_PAGE_TABLE_MEGS 64
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+#define BX_MAX_DIRTY_PAGE_TABLE_MEGS 1024
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// Compile in support for virtual/linear/physical breakpoints.
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// Set to 1, only those you need. Recommend using only linear
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Index: bochs-cvs/main.cc
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===================================================================
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RCS file: /cvsroot/bochs/bochs/main.cc,v
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retrieving revision 1.146
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diff -u -r1.146 main.cc
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--- bochs-cvs/main.cc 24 Sep 2002 22:49:52 -0000 1.146
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+++ bochs-cvs/main.cc 25 Sep 2002 00:57:15 -0000
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@@ -1609,7 +1609,7 @@
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BX_CPU(0)->reset(BX_RESET_HARDWARE);
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#else
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// SMP initialization
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- bx_mem_array[0] = new BX_MEM_C ();
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+ bx_mem_array[0] = new BX_MEM_C (bx_options.memory.Osize->get() * 1024*1024);
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bx_mem_array[0]->init_memory(bx_options.memory.Osize->get () * 1024*1024);
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// First load the optional ROM images
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Index: bochs-cvs/memory/misc_mem.cc
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===================================================================
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RCS file: /cvsroot/bochs/bochs/memory/misc_mem.cc,v
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retrieving revision 1.30
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diff -u -r1.30 misc_mem.cc
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--- bochs-cvs/memory/misc_mem.cc 19 Sep 2002 19:17:20 -0000 1.30
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+++ bochs-cvs/memory/misc_mem.cc 25 Sep 2002 00:57:15 -0000
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@@ -123,6 +123,7 @@
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BX_DEBUG(("Init $Id: patch.highmem,v 1.1 2002-09-25 13:29:11 bdenney Exp $"));
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// you can pass 0 if memory has been allocated already through
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// the constructor, or the desired size of memory if it hasn't
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+ BX_INFO(("%.2fMB", (float)(BX_MEM_THIS megabytes) ));
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if (BX_MEM_THIS vector == NULL) {
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// memory not already allocated, do now...
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@@ -131,21 +132,8 @@
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BX_MEM_THIS megabytes = memsize / (1024*1024);
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BX_INFO(("%.2fMB", (float)(BX_MEM_THIS megabytes) ));
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}
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- // initialize all memory to 0x00
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- memset(BX_MEM_THIS vector, 0x00, BX_MEM_THIS len);
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-
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- // initialize ROM area (0xc0000 .. 0xfffff) to 0xff
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- memset(BX_MEM_THIS vector + 0xc0000, 0xff, 0x40000);
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-
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-#if BX_PCI_SUPPORT
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- // initialize PCI shadow RAM area (0xc0000 .. 0xfffff) to 0x00
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- memset(BX_MEM_THIS shadow, 0x00, 0x40000);
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-#endif
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#if BX_DEBUGGER
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- // initialize dirty pages table
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- memset(dbg_dirty_pages, 0, sizeof(dbg_dirty_pages));
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-
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if (megabytes > BX_MAX_DIRTY_PAGE_TABLE_MEGS) {
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BX_INFO(("Error: memory larger than dirty page table can handle"));
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BX_PANIC(("Error: increase BX_MAX_DIRTY_PAGE_TABLE_MEGS"));
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-------------------------------------------------------
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_______________________________________________
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