Modules/armv7 - GIC support coming along

[tpg/acess2.git] / Modules / armv7 / GIC / gic.c

diff --git a/Modules/armv7/GIC/gic.c b/Modules/armv7/GIC/gic.c
index 90682f6..190b995 100644 (file)
--- a/Modules/armv7/GIC/gic.c
+++ b/Modules/armv7/GIC/gic.c
@@ -5,23 +5,63 @@
  * gic.c
  * - GIC Core
  */
+#define DEBUG  1
+
 #include <acess.h>
 #include <modules.h>
+#include "gic.h"
+
+// === IMPORTS ===
+extern void    *gpIRQHandler;
 
 // === PROTOTYPES ===
  int   GIC_Install(char **Arguments);
+void   GIC_IRQHandler(void);
 
 // === GLOBALS ===
 MODULE_DEFINE(0, 0x100, armv7_GIC, GIC_Install, NULL, NULL);
+Uint32 *gpGIC_DistributorBase;
+Uint32 *gpGIC_InterfaceBase;
+tPAddr gGIC_DistributorAddr;
+tPAddr gGIC_InterfaceAddr;
 
 // === CODE ===
 int GIC_Install(char **Arguments)
 {
+       // Realview PB
+       gGIC_InterfaceAddr   = 0x1e000000;
+       gGIC_DistributorAddr = 0x1e001000;
+
+       // Initialise
+       gpGIC_InterfaceBase = (void*)MM_MapHWPages(gGIC_InterfaceAddr, 1);
+       gpGIC_DistributorBase = (void*)MM_MapHWPages(gGIC_DistributorAddr, 1);
+
+       gpGIC_InterfaceBase[GICC_PMR] = 0xFF;   
+       gpGIC_InterfaceBase[GICC_CTLR] = 1;     // Enable CPU
+       gpGIC_DistributorBase[GICD_CTLR] = 1;   // Enable Distributor
+
+       gpIRQHandler = GIC_IRQHandler;
+
+       __asm__ __volatile__ ("cpsie if");      // Enable IRQs and FIQs
+
        return MODULE_ERR_OK;
 }
 
+void GIC_IRQHandler(void)
+{
+       Uint32  num = gpGIC_InterfaceBase[GICC_IAR];
+       Log_Debug("GIC", "IRQ 0x%x", num);
+       gpGIC_InterfaceBase[GICC_EOIR] = 1;
+}
+
 int IRQ_AddHandler(int IRQ, void (*Handler)(int, void*), void *Ptr)
 {
+       LOG("IRQ = %i", IRQ);
+       IRQ += 32;      // 32 internal IRQs
+       LOG("IRQ = %i (after adjust)", IRQ);
+       LOG("mask = 0x%x", 1 << (IRQ & (31-1)));
+       gpGIC_DistributorBase[GICD_ISENABLER0+IRQ/32] = 1 << (IRQ & (32-1));
+       ((Uint8*)&gpGIC_DistributorBase[GICD_ITARGETSR0])[IRQ] = 1;
        Log_Warning("GIC", "TODO: Implement IRQ_AddHandler");
        return 0;
 }