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MFi386: sync with latest updates

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This commit is contained in:
Peter Wemm 2004-10-11 21:51:27 +00:00
parent 31e81ae45d
commit 598f31f75a
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=136401
1 changed files with 36 additions and 3 deletions
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39
sys/amd64/pci/pci_bus.c
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@ -35,6 +35,7 @@ __FBSDID("$FreeBSD$");
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/module.h>
#include <sys/sysctl.h>
#include <dev/pci/pcivar.h>
#include <dev/pci/pcireg.h>
@ -42,6 +43,7 @@ __FBSDID("$FreeBSD$");
#include <isa/isavar.h>
#include <machine/legacyvar.h>
#include <machine/pci_cfgreg.h>
#include <machine/resource.h>
#include "pcib_if.h"
@ -81,8 +83,8 @@ legacy_pcib_route_interrupt(device_t pcib, device_t dev, int pin)
static const char *
legacy_pcib_is_host_bridge(int bus, int slot, int func,
u_int32_t id, u_int8_t class, u_int8_t subclass,
u_int8_t *busnum)
uint32_t id, uint8_t class, uint8_t subclass,
uint8_t *busnum)
{
const char *s = NULL;
@ -262,6 +264,37 @@ legacy_pcib_write_ivar(device_t dev, device_t child, int which,
return ENOENT;
}
SYSCTL_DECL(_hw_pci);
static int legacy_host_mem_start = 0x80000000;
/* No TUNABLE_ULONG :-( */
TUNABLE_INT("hw.pci.host_mem_start", &legacy_host_mem_start);
SYSCTL_INT(_hw_pci, OID_AUTO, host_mem_start, CTLFLAG_RDTUN,
&legacy_host_mem_start, 0x80000000,
"Limit the host bridge memory to being above this address. Must be\n\
set at boot via a tunable.");
static struct resource *
legacy_pcib_alloc_resource(device_t dev, device_t child, int type, int *rid,
u_long start, u_long end, u_long count, u_int flags)
{
/*
* If no memory preference is given, use upper 32MB slot most
* bioses use for their memory window. Typically other bridges
* before us get in the way to assert their preferences on memory.
* Hardcoding like this sucks, so a more MD/MI way needs to be
* found to do it. This is typically only used on older laptops
* that don't have pci busses behind pci bridge, so assuming > 32MB
* is liekly OK.
*
* However, this can cause problems for other chipsets, so we make
* this tunable by hw.pci.host_mem_start.
*/
if (type == SYS_RES_MEMORY && start == 0UL && end == ~0UL)
start = legacy_host_mem_start;
return (bus_generic_alloc_resource(dev, child, type, rid, start, end,
count, flags));
}
static device_method_t legacy_pcib_methods[] = {
/* Device interface */
@ -276,7 +309,7 @@ static device_method_t legacy_pcib_methods[] = {
DEVMETHOD(bus_print_child, bus_generic_print_child),
DEVMETHOD(bus_read_ivar, legacy_pcib_read_ivar),
DEVMETHOD(bus_write_ivar, legacy_pcib_write_ivar),
DEVMETHOD(bus_alloc_resource, bus_generic_alloc_resource),
DEVMETHOD(bus_alloc_resource, legacy_pcib_alloc_resource),
DEVMETHOD(bus_release_resource, bus_generic_release_resource),
DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),