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Make the start memory address that we use configurable via a boot

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loader parameter.  This allows us to more easily boot on big memory
configuration machines.  hw.pccbb.start_mem.  Reflect this in a sysctl
so we can read it from userland.

# Note: we need a TUNABLE_ULONG to do this right.  I'll add that to
# kernel.h soon.
This commit is contained in:
Warner Losh 2001-11-26 07:17:09 +00:00
parent e8cb41d36f
commit 969c260d72
1 changed files with 16 additions and 5 deletions
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21
sys/dev/pccbb/pccbb.c
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@ -55,6 +55,7 @@
#include <sys/lock.h>
#include <sys/malloc.h>
#include <sys/mutex.h>
#include <sys/sysctl.h>
#include <sys/bus.h>
#include <machine/bus.h>
@ -194,6 +195,16 @@ struct yenta_chipinfo {
CB_UNKNOWN, 0},
};
/* sysctl vars */
SYSCTL_NODE(_hw, OID_AUTO, pccbb, CTLFLAG_RD, 0, "PCCBB parameters");
/* There's no way to say TUNEABLE_LONG to get the right types */
u_long pccbb_start_mem = PCCBB_START_MEM;
TUNABLE_INT("hw.pccbb.start_memory", (int *)&pccbb_start_mem);
SYSCTL_ULONG(_hw_pccbb, OID_AUTO, start_mem, CTLFLAG_RD,
&pccbb_start_mem, PCCBB_START_MEM,
"Starting address for memory allocations");
static int cb_chipset(u_int32_t pci_id, const char **namep, int *flagp);
static int pccbb_probe(device_t brdev);
static void pccbb_chipinit(struct pccbb_softc *sc);
@ -440,7 +451,7 @@ pccbb_attach(device_t brdev)
-(sockbase & 0xfffffff0);
sc->sc_base_res = bus_generic_alloc_resource(
device_get_parent(brdev), brdev, SYS_RES_MEMORY,
&rid, PCCBB_START_MEM, ~0, sockbase,
&rid, pccbb_start_mem, ~0, sockbase,
RF_ACTIVE|rman_make_alignment_flags(sockbase));
if (!sc->sc_base_res){
device_printf(brdev,
@ -1262,8 +1273,8 @@ pccbb_cardbus_alloc_resource(device_t brdev, device_t child, int type, int *rid,
end = start;
break;
case SYS_RES_MEMORY:
if (start <= PCCBB_START_MEM)
start = PCCBB_START_MEM;
if (start <= pccbb_start_mem)
start = pccbb_start_mem;
if (end < start)
end = start;
break;
@ -1780,8 +1791,8 @@ pccbb_pcic_alloc_resource(device_t brdev, device_t child, int type, int *rid,
switch (type) {
case SYS_RES_MEMORY:
if (start < PCCBB_START_MEM)
start = PCCBB_START_MEM;
if (start < pccbb_start_mem)
start = pccbb_start_mem;
if (end < start)
end = start;
flags = (flags & ~RF_ALIGNMENT_MASK) |