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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-changelog] [xen-unstable] hvmloader: Simplify e820_malloc() interface and improve
# HG changeset patch
# User Keir Fraser <keir@xxxxxxxxxxxxx>
# Date 1177006932 -3600
# Node ID 438f3a016fd804b17a1ee869c5196d092613a780
# Parent ce2b25e1c8f6a1ac3b0be6051c715200063fcfaf
hvmloader: Simplify e820_malloc() interface and improve
implementation. Strip unnecessary sections from the highmem bios
extension elf image.
Signed-off-by: Keir Fraser <keir@xxxxxxxxxxxxx>
---
tools/firmware/hvmloader/32bitbios_support.c | 6 -
tools/firmware/hvmloader/acpi/build.c | 3
tools/firmware/hvmloader/util.c | 99 +++++++++++++++------------
tools/firmware/hvmloader/util.h | 4 -
tools/firmware/rombios/32bit/Makefile | 2
5 files changed, 63 insertions(+), 51 deletions(-)
diff -r ce2b25e1c8f6 -r 438f3a016fd8
tools/firmware/hvmloader/32bitbios_support.c
--- a/tools/firmware/hvmloader/32bitbios_support.c Thu Apr 19 18:13:09
2007 +0100
+++ b/tools/firmware/hvmloader/32bitbios_support.c Thu Apr 19 19:22:12
2007 +0100
@@ -121,13 +121,9 @@ static void copy_jumptable(char *elfarra
static void relocate_32bitbios(char *elfarray, uint32_t elfarraysize)
{
- uint32_t mask = (64 * 1024) - 1;
char *highbiosarea;
- highbiosarea = (char *)(long)
- e820_malloc((elfarraysize + mask) & ~mask, /* round to 64kb */
- E820_RESERVED,
- (uint64_t)0xffffffff);
+ highbiosarea = (char *)(long)e820_malloc(elfarraysize);
if ( highbiosarea == NULL )
{
printf("No available memory for BIOS high memory area\n");
diff -r ce2b25e1c8f6 -r 438f3a016fd8 tools/firmware/hvmloader/acpi/build.c
--- a/tools/firmware/hvmloader/acpi/build.c Thu Apr 19 18:13:09 2007 +0100
+++ b/tools/firmware/hvmloader/acpi/build.c Thu Apr 19 19:22:12 2007 +0100
@@ -269,8 +269,7 @@ int construct_secondary_tables(uint8_t *
tcpa->header.oem_revision = ACPI_OEM_REVISION;
tcpa->header.creator_id = ACPI_CREATOR_ID;
tcpa->header.creator_revision = ACPI_CREATOR_REVISION;
- tcpa->lasa = e820_malloc(
- ACPI_2_0_TCPA_LAML_SIZE, E820_RESERVED, (uint32_t)~0);
+ tcpa->lasa = e820_malloc(ACPI_2_0_TCPA_LAML_SIZE);
if ( tcpa->lasa )
{
tcpa->laml = ACPI_2_0_TCPA_LAML_SIZE;
diff -r ce2b25e1c8f6 -r 438f3a016fd8 tools/firmware/hvmloader/util.c
--- a/tools/firmware/hvmloader/util.c Thu Apr 19 18:13:09 2007 +0100
+++ b/tools/firmware/hvmloader/util.c Thu Apr 19 19:22:12 2007 +0100
@@ -134,19 +134,11 @@ void *memcpy(void *dest, const void *src
void *memmove(void *dest, const void *src, unsigned n)
{
- if ( (long)dest > (long)src )
- {
- n--;
- while ( n > 0 )
- {
+ if ( (unsigned long)dest > (unsigned long)src )
+ while ( n-- != 0 )
((char *)dest)[n] = ((char *)src)[n];
- n--;
- }
- }
else
- {
memcpy(dest, src, n);
- }
return dest;
}
@@ -292,37 +284,62 @@ uuid_to_string(char *dest, uint8_t *uuid
*p = '\0';
}
-uint64_t e820_malloc(uint64_t size, uint32_t type, uint64_t mask)
-{
- uint64_t addr = 0;
- int c = *E820_MAP_NR - 1;
- struct e820entry *e820entry = (struct e820entry *)E820_MAP;
-
- while ( c >= 0 )
- {
- if ( (e820entry[c].type == E820_RAM) &&
- ((e820entry[c].addr & (~mask)) == 0) &&
- (e820entry[c].size >= size) )
- {
- addr = e820entry[c].addr;
- if ( e820entry[c].size != size )
- {
- (*E820_MAP_NR)++;
- memmove(&e820entry[c+1],
- &e820entry[c],
- (*E820_MAP_NR - c) *
- sizeof(struct e820entry));
- e820entry[c].size -= size;
- addr += e820entry[c].size;
- c++;
- }
- e820entry[c].addr = addr;
- e820entry[c].size = size;
- e820entry[c].type = type;
- break;
- }
- c--;
- }
+static void e820_collapse(void)
+{
+ int i = 0;
+ struct e820entry *ent = (struct e820entry *)E820_MAP;
+
+ while ( i < (*E820_MAP_NR-1) )
+ {
+ if ( (ent[i].type == ent[i+1].type) &&
+ ((ent[i].addr + ent[i].size) == ent[i+1].addr) )
+ {
+ ent[i].size += ent[i+1].size;
+ memcpy(&ent[i+1], &ent[i+2], *E820_MAP_NR - i - 2);
+ (*E820_MAP_NR)--;
+ }
+ else
+ {
+ i++;
+ }
+ }
+}
+
+uint32_t e820_malloc(uint32_t size)
+{
+ uint32_t addr;
+ int i;
+ struct e820entry *ent = (struct e820entry *)E820_MAP;
+
+ /* Align allocation request to a reasonable boundary (1kB). */
+ size = (size + 1023) & ~1023;
+
+ for ( i = *E820_MAP_NR - 1; i >= 0; i-- )
+ {
+ addr = ent[i].addr;
+ if ( (ent[i].type != E820_RAM) || /* not ram? */
+ (ent[i].size < size) || /* too small? */
+ (addr != ent[i].addr) || /* starts above 4gb? */
+ ((addr + size) < addr) ) /* ends above 4gb? */
+ continue;
+
+ if ( ent[i].size != size )
+ {
+ memmove(&ent[i+1], &ent[i], (*E820_MAP_NR - i) * sizeof(*ent));
+ (*E820_MAP_NR)++;
+ ent[i].size -= size;
+ addr += ent[i].size;
+ i++;
+ }
+
+ ent[i].addr = addr;
+ ent[i].size = size;
+ ent[i].type = E820_RESERVED;
+ break;
+ }
+
+ e820_collapse();
+
return addr;
}
diff -r ce2b25e1c8f6 -r 438f3a016fd8 tools/firmware/hvmloader/util.h
--- a/tools/firmware/hvmloader/util.h Thu Apr 19 18:13:09 2007 +0100
+++ b/tools/firmware/hvmloader/util.h Thu Apr 19 19:22:12 2007 +0100
@@ -79,8 +79,8 @@ int printf(const char *fmt, ...) __attri
int printf(const char *fmt, ...) __attribute__ ((format (printf, 1, 2)));
int vprintf(const char *fmt, va_list ap);
-/* Allocate region of specified type in the e820 table. */
-uint64_t e820_malloc(uint64_t size, uint32_t type, uint64_t mask);
+/* Reserve a RAM region in the e820 table. */
+uint32_t e820_malloc(uint32_t size);
/* General e820 access. */
#include <xen/hvm/e820.h>
diff -r ce2b25e1c8f6 -r 438f3a016fd8 tools/firmware/rombios/32bit/Makefile
--- a/tools/firmware/rombios/32bit/Makefile Thu Apr 19 18:13:09 2007 +0100
+++ b/tools/firmware/rombios/32bit/Makefile Thu Apr 19 19:22:12 2007 +0100
@@ -32,7 +32,7 @@ clean:
done;
$(TARGET): subdirs 32bitbios.o util.o
- $(LD) $(LDFLAGS_DIRECT) -r 32bitbios.o $(MODULES) util.o -o
32bitbios_all.o
+ $(LD) $(LDFLAGS_DIRECT) -s -r 32bitbios.o $(MODULES) util.o -o
32bitbios_all.o
@nm 32bitbios_all.o | \
grep -E -q '^ +U ' && { \
echo "There are undefined symbols in the BIOS:"; \
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