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authorRalf Baechle <ralf@linux-mips.org>2007-07-27 19:31:10 +0100
committerRalf Baechle <ralf@linux-mips.org>2007-07-31 21:35:24 +0100
commit07cc0c9e65d3e262f871ea357dd77b41950b1ca5 (patch)
treefa797fa236da6e03c7b778cdc364ac1c3e03b52f /arch/mips/kernel/rtlx.c
parentc3a005f4b6a7752608e75d016ef8d07c55285e48 (diff)
downloadop-kernel-dev-07cc0c9e65d3e262f871ea357dd77b41950b1ca5.zip
op-kernel-dev-07cc0c9e65d3e262f871ea357dd77b41950b1ca5.tar.gz
[MIPS] MT: Enable coexistence of AP/SP with VSMP and SMTC.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/kernel/rtlx.c')
-rw-r--r--arch/mips/kernel/rtlx.c22
1 files changed, 17 insertions, 5 deletions
diff --git a/arch/mips/kernel/rtlx.c b/arch/mips/kernel/rtlx.c
index 8cf24d7..5c04006 100644
--- a/arch/mips/kernel/rtlx.c
+++ b/arch/mips/kernel/rtlx.c
@@ -40,12 +40,11 @@
#include <asm/atomic.h>
#include <asm/cpu.h>
#include <asm/processor.h>
+#include <asm/mips_mt.h>
#include <asm/system.h>
#include <asm/vpe.h>
#include <asm/rtlx.h>
-#define RTLX_TARG_VPE 1
-
static struct rtlx_info *rtlx;
static int major;
static char module_name[] = "rtlx";
@@ -165,10 +164,10 @@ int rtlx_open(int index, int can_sleep)
}
if (rtlx == NULL) {
- if( (p = vpe_get_shared(RTLX_TARG_VPE)) == NULL) {
+ if( (p = vpe_get_shared(tclimit)) == NULL) {
if (can_sleep) {
__wait_event_interruptible(channel_wqs[index].lx_queue,
- (p = vpe_get_shared(RTLX_TARG_VPE)),
+ (p = vpe_get_shared(tclimit)),
ret);
if (ret)
goto out_fail;
@@ -477,6 +476,19 @@ static int rtlx_module_init(void)
struct device *dev;
int i, err;
+ if (!cpu_has_mipsmt) {
+ printk("VPE loader: not a MIPS MT capable processor\n");
+ return -ENODEV;
+ }
+
+ if (tclimit == 0) {
+ printk(KERN_WARNING "No TCs reserved for AP/SP, not "
+ "initializing RTLX.\nPass maxtcs=<n> argument as kernel "
+ "argument\n");
+
+ return -ENODEV;
+ }
+
major = register_chrdev(0, module_name, &rtlx_fops);
if (major < 0) {
printk(register_chrdev_failed);
@@ -501,7 +513,7 @@ static int rtlx_module_init(void)
/* set up notifiers */
notify.start = starting;
notify.stop = stopping;
- vpe_notify(RTLX_TARG_VPE, &notify);
+ vpe_notify(tclimit, &notify);
if (cpu_has_vint)
set_vi_handler(MIPS_CPU_RTLX_IRQ, rtlx_dispatch);
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