Initial smi_event infrastructure

diff --git a/aseg/counter.c b/aseg/counter.c
index 1138e53eb02519b38c093be6cc136b1136292ec0..85b73eba3c98a10ced98c329cb7ae8bf54cd64d1 100644 (file)
--- a/aseg/counter.c
+++ b/aseg/counter.c
@@ -48,6 +48,18 @@ void pci_dump() {
        outl(0x840, 0x0100);
 }
 
+void timer_handler(smi_event_t ev)
+{
+       static unsigned int ticks = 0;
+       
+       smi_disable_event(SMI_EVENT_FAST_TIMER);
+       smi_enable_event(SMI_EVENT_FAST_TIMER);
+       
+       outb(0x80, (ticks++) & 0xFF);
+       
+       outlog();
+}
+
 void smi_entry(void)
 {
        char statstr[512];
@@ -56,8 +68,6 @@ void smi_entry(void)
        vgasave = inb(0x3D4);
        
        counter++;
-       outb(0x80, (counter & 0xFF));
-       
        sprintf(statstr, "15-412! %08x %08x", smi_status(), counter);
        strblit(statstr, 0, 0);
        
@@ -77,7 +87,6 @@ void smi_entry(void)
        }
 
        smi_poll();
-       outlog();
        
        outl(0xCF8, pcisave);
        outb(0x3D4, vgasave);

diff --git a/aseg/firstrun.c b/aseg/firstrun.c
index 9589a13432cf30db6a88e3d6780032d15fa2da33..323f1ab751f0f3c825379dbf92104e2af85f4d34 100644 (file)
--- a/aseg/firstrun.c
+++ b/aseg/firstrun.c
@@ -7,6 +7,8 @@
 
 extern int _bss, _bssend;
 
+extern void timer_handler(smi_event_t ev);
+
 void __firstrun_start() {
        unsigned char *bp;
        smram_state_t smram;
@@ -26,7 +28,9 @@ void __firstrun_start() {
        pci_write16(0, 31, 4, 0xC0, 0);
 
        /* Turn on the SMIs we want */
-       outb(0x830, inb(0x830) | ICH2_SMI_EN_SWSMI_TMR_EN);
+       smi_disable();
+       smi_register_handler(SMI_EVENT_FAST_TIMER, timer_handler);
+       smi_enable_event(SMI_EVENT_FAST_TIMER);
        outb(0x848, ICH2_DEVTRAP_EN_KBC_TRP_EN);
        smi_enable();
        

diff --git a/ich2/smi.c b/ich2/smi.c
index adba74f4b285c2ef046761d9896d4d3eabbad714..d255615fbc9439db215e659f613a437e84759c70 100644 (file)
--- a/ich2/smi.c
+++ b/ich2/smi.c
@@ -6,6 +6,8 @@
 #include <reg-82801b.h>
 #include <output.h>
 
+static smi_handler_t _handlers[SMI_EVENT_MAX] = {0};
+
 static uint16_t _get_PMBASE()
 {
        static long pmbase = -1;
@@ -64,11 +66,11 @@ void smi_poll()
        
        if (sts & ICH2_SMI_STS_SWSMI_TMR_STS)   // Ack it, then request another.
        {
+               if (_handlers[SMI_EVENT_FAST_TIMER] == SMI_HANDLER_NONE)
+                       output("Unhandled: SWSMI_TMR_STS");
+               else if (_handlers[SMI_EVENT_FAST_TIMER] != SMI_HANDLER_IGNORE)
+                       _handlers[SMI_EVENT_FAST_TIMER](SMI_EVENT_FAST_TIMER);
                outl(_get_PMBASE() + ICH2_PMBASE_SMI_STS, ICH2_SMI_STS_SWSMI_TMR_STS);
-               outl(_get_PMBASE() + ICH2_PMBASE_SMI_EN,
-                       inl(_get_PMBASE() + ICH2_PMBASE_SMI_EN) & ~ICH2_SMI_EN_SWSMI_TMR_EN);
-               outl(_get_PMBASE() + ICH2_PMBASE_SMI_EN,
-                       inl(_get_PMBASE() + ICH2_PMBASE_SMI_EN) | ICH2_SMI_EN_SWSMI_TMR_EN);
        }
        
        if (sts & ICH2_SMI_STS_PM1_STS_REG)
@@ -165,3 +167,39 @@ void smi_poll()
                        ICH2_SMI_EN_EOS |
                        ICH2_SMI_EN_GBL_SMI_EN);
 }
+
+int smi_register_handler(smi_event_t ev, smi_handler_t hnd)
+{
+       if (ev >= SMI_EVENT_MAX)
+               return -1;
+       _handlers[ev] = hnd;
+       return 0;
+}
+
+int smi_enable_event(smi_event_t ev)
+{
+       switch(ev)
+       {
+       case SMI_EVENT_FAST_TIMER:
+               outl(_get_PMBASE() + ICH2_PMBASE_SMI_EN,
+                       inl(_get_PMBASE() + ICH2_PMBASE_SMI_EN) |
+                               ICH2_SMI_EN_SWSMI_TMR_EN);
+               return 0;
+       default:
+               return -1;
+       }
+}
+
+int smi_disable_event(smi_event_t ev)
+{
+       switch(ev)
+       {
+       case SMI_EVENT_FAST_TIMER:
+               outl(_get_PMBASE() + ICH2_PMBASE_SMI_EN,
+                       inl(_get_PMBASE() + ICH2_PMBASE_SMI_EN) &
+                               ~ICH2_SMI_EN_SWSMI_TMR_EN);
+               return 0;
+       default:
+               return -1;
+       }
+}

diff --git a/include/smi.h b/include/smi.h
index c669fc243d15f217f73ab4264f97c48cf3abff0c..670dc63eaf7968e501bb8a9bee2384ae2020e1f7 100644 (file)
--- a/include/smi.h
+++ b/include/smi.h
@@ -7,4 +7,19 @@ extern void smi_enable();
 extern void smi_poll();
 extern unsigned long smi_status();     /* Architecturally defined; for debugging only. */
 
+typedef enum {
+       SMI_EVENT_FAST_TIMER = 0,
+       SMI_EVENT_MAX
+} smi_event_t;
+
+
+typedef void (*smi_handler_t)(smi_event_t);
+
+#define SMI_HANDLER_NONE       ((smi_handler_t)0)
+#define SMI_HANDLER_IGNORE     ((smi_handler_t)-1)
+
+extern int smi_register_handler(smi_event_t ev, smi_handler_t hnd);
+extern int smi_enable_event(smi_event_t ev);
+extern int smi_disable_event(smi_event_t ev);
+
 #endif