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Issue a dummy read after a write to the BONITO_PCIMAP_CFG register to 

make sure the write is posted; needed to keep the BONITO64 happy.
This commit is contained in:
simonb 2002-08-18 15:57:55 +00:00
parent 98b535ba4a
commit fd2320f396
1 changed files with 7 additions and 3 deletions
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10
sys/arch/mips/bonito/bonito_pci.c
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@ -1,4 +1,4 @@
/* $NetBSD: bonito_pci.c,v 1.1 2001/06/22 03:58:55 thorpej Exp $ */
/* $NetBSD: bonito_pci.c,v 1.2 2002/08/18 15:57:55 simonb Exp $ */
/*-
* Copyright (c) 2001 The NetBSD Foundation, Inc.
@ -141,7 +141,7 @@ bonito_conf_read(void *v, pcitag_t tag, int offset)
{
struct bonito_config *bc = v;
pcireg_t data;
u_int32_t cfgoff, pcimap_cfg;
u_int32_t cfgoff, dummy, pcimap_cfg;
int s;
if (bonito_conf_addr(bc, tag, offset, &cfgoff, &pcimap_cfg))
@ -157,6 +157,8 @@ bonito_conf_read(void *v, pcitag_t tag, int offset)
REGVAL(BONITO_PCIMAP_CFG) = (cfgoff >> 16) | pcimap_cfg;
wbflush();
/* Issue a read to make sure the write is posted */
dummy = REGVAL(BONITO_PCIMAP_CFG);
/* low 16 bits of address are offset into config space */
data = REGVAL(BONITO_PCICFG_BASE + (cfgoff & 0xfffc));
@ -175,7 +177,7 @@ void
bonito_conf_write(void *v, pcitag_t tag, int offset, pcireg_t data)
{
struct bonito_config *vt = v;
u_int32_t cfgoff, pcimap_cfg;
u_int32_t cfgoff, dummy, pcimap_cfg;
int s;
if (bonito_conf_addr(vt, tag, offset, &cfgoff, &pcimap_cfg))
@ -191,6 +193,8 @@ bonito_conf_write(void *v, pcitag_t tag, int offset, pcireg_t data)
REGVAL(BONITO_PCIMAP_CFG) = (cfgoff >> 16) | pcimap_cfg;
wbflush();
/* Issue a read to make sure the write is posted */
dummy = REGVAL(BONITO_PCIMAP_CFG);
/* low 16 bits of address are offset into config space */
REGVAL(BONITO_PCICFG_BASE + (cfgoff & 0xfffc)) = data;