ACPI support !

1 files changed, 52 insertions, 0 deletions

diff --git a/kernel/smp.c b/kernel/smp.c
new file mode 100644
index 0000000..58e37a5
--- /dev/null
+++ b/kernel/smp.c
@@ -0,0 +1,52 @@
+#define FOOLOS_MODULE_NAME "smp"
+
+#include "lib/logger/log.h"
+#include "lib/int/stdint.h"
+#include "smp.h"
+
+#define FOOLOS_APIC_SPUR_INT 0x00f0
+#define FOOLOS_APIC_INT_COMMAND_LOW 0x0300
+#define FOOLOS_APIC_INT_COMMAND_HIGH 0x0310
+
+void smp_log_procdata(smp_processors *procdata)
+{
+    log(FOOLOS_MODULE_NAME,FOOLOS_LOG_INFO,"---- smp -----");
+    for(int i=0;i<procdata->processors;i++)
+    {
+	log(FOOLOS_MODULE_NAME,FOOLOS_LOG_INFO,"cpu %d : local_apic_id: 0x%X bps: %s local_apic_addr:0x%08X",i,procdata->local_apic_id[i],i==procdata->boot?"yes":"no",procdata->local_apic_address);
+    }
+
+}
+
+// this will start all our application processors!
+void smp_start_aps(smp_processors *pros)
+{
+    
+	//bsp (boot processor) enables its local apic
+	uint32_t *reg=pros->local_apic_address+FOOLOS_APIC_SPUR_INT;
+	*reg=0xffffffff; // all bits 1 and interrupt 255
+
+        for(int i=0;i<pros->processors;i++)
+	{
+	    if(pros->boot==i)continue;
+
+	    log(FOOLOS_MODULE_NAME,FOOLOS_LOG_INFO,"starting cpu %d",i);
+
+	    uint8_t dest=pros->local_apic_id[i];
+
+	    reg=pros->local_apic_address+FOOLOS_APIC_INT_COMMAND_HIGH;
+	    *reg=dest<<24; // destination apic.
+
+	    reg=pros->local_apic_address+FOOLOS_APIC_INT_COMMAND_LOW;
+	    *reg=(5<<8)|(1<<14); // 101 INIT
+
+	    // do we really neet this?
+	    // todo: use some real sleep (not implemented yet :( )
+	    sleep(10);
+
+	    // start proc at 0x7000;
+	    *reg=(6<<8)|(1<<14)|0x7; // 110 SIPI
+	}
+}
+
+