Fix some early z180 compile errors

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@5430 42af7a65-404d-4744-a932-0658087f49c3

5 files changed, 39 insertions, 22 deletions

diff --git a/nuttx/arch/z80/src/z180/switch.h b/nuttx/arch/z80/src/z180/switch.h
index aa33bd1e1..ae80f4f76 100644
--- a/nuttx/arch/z80/src/z180/switch.h
+++ b/nuttx/arch/z80/src/z180/switch.h
@@ -42,7 +42,9 @@
  ************************************************************************************/
 
 #include <nuttx/sched.h>
+
 #include <nuttx/arch.h>
+#include <arch/io.h>
 
 #include "z180_iomap.h"
 #include "up_internal.h"
@@ -112,13 +114,14 @@
       current_regs = savestate; \
       if (current_regs) \
         { \
-          current_cbr  = savecbr; \
+          current_cbr = savecbr; \
         } \
       else \
         { \
           outp(Z180_MMU_CBR, savecbr); \
         } \
-    }
+    } \
+  while (0)
 
 /* The following macro is used to sample the interrupt state (as a opaque handle) */
 
@@ -135,9 +138,9 @@
 #define SET_IRQCONTEXT(tcb) \
   do \
     { \
-      if ((tcb)->xcp.cbr.cbr) \
+      if ((tcb)->xcp.cbr) \
         { \
-          current_cbr = (tcb)->xcp.cbr->cbr); \
+          current_cbr = (tcb)->xcp.cbr->cbr; \
         } \
       z180_copystate((FAR chipreg_t*)current_regs, (tcb)->xcp.regs); \
     } \
@@ -157,7 +160,7 @@
 #define RESTORE_USERCONTEXT(tcb) \
   do \
     { \
-      if ((tcb)->xcp.cbr.cbr) \
+      if ((tcb)->xcp.cbr) \
         { \
           outp(Z180_MMU_CBR, (tcb)->xcp.cbr->cbr); \
         } \
diff --git a/nuttx/arch/z80/src/z180/z180_head.asm b/nuttx/arch/z80/src/z180/z180_head.asm
index ddd0283e9..cb370ffda 100644
--- a/nuttx/arch/z80/src/z180/z180_head.asm
+++ b/nuttx/arch/z80/src/z180/z180_head.asm
@@ -62,7 +62,7 @@
 
 	.globl	_os_start			; OS entry point
 	.globl	_up_doirq			; Interrupt decoding logic
-	.globl	z180_mmu_lowinit	; MMU initialization logic
+	.globl	_z180_mmu_lowinit	; MMU initialization logic
 
 ;**************************************************************************
 ; Reset entry point
@@ -172,7 +172,7 @@ _up_reset:
 	; Configure the MMU so that things will lie at the addresses that we
 	; expect them to
 
-	call	z180_mmu_lowinit	; Initialize the MMU
+	call	_z180_mmu_lowinit	; Initialize the MMU
 
 	; Performed initialization unique to the SDCC toolchain
 
diff --git a/nuttx/arch/z80/src/z180/z180_irq.c b/nuttx/arch/z80/src/z180/z180_irq.c
index 929f38d6a..d5d625b33 100644
--- a/nuttx/arch/z80/src/z180/z180_irq.c
+++ b/nuttx/arch/z80/src/z180/z180_irq.c
@@ -58,6 +58,14 @@
 
 volatile chipreg_t *current_regs;
 
+/* This holds the value of the MMU's CBR register.  This value is set to the
+ * interrupted tasks's CBR on interrupt entry, changed to the new task's CBR if
+ * an interrrupt level context switch occurs, and restored on interrupt exit.  In
+ * this way, the CBR is always correct on interrupt exit.
+ */
+
+uint8_t current_cbr;
+
 /****************************************************************************
  * Private Data
  ****************************************************************************/
diff --git a/nuttx/arch/z80/src/z180/z180_mmu.c b/nuttx/arch/z80/src/z180/z180_mmu.c
index 076d91bef..e24b22b8e 100644
--- a/nuttx/arch/z80/src/z180/z180_mmu.c
+++ b/nuttx/arch/z80/src/z180/z180_mmu.c
@@ -41,8 +41,15 @@
 
 #include <nuttx/config.h>
 
-#include <nuttx/gram.h>
+#include <errno.h>
+#include <debug.h>
 
+#include <nuttx/gran.h>
+
+#include <arch/irq.h>
+#include <arch/io.h>
+
+#include "up_internal.h"
 #include "z180_mmu.h"
 
 /****************************************************************************
@@ -223,7 +230,7 @@ int up_addrenv_create(FAR _TCB *tcb, size_t envsize)
     {
       sdbg("ERROR: No free CBR structures\n");
       ret = -ENOMEM;
-      goto errout_with_irq
+      goto errout_with_irq;
     }
 
   /* Now allocate the physical memory to back up the address environment */
@@ -297,7 +304,7 @@ int up_addrenv_share(FAR const _TCB *ptcb, FAR _TCB *ctcb)
        * copy in the child thread's TCB.
        */
 
-      ptcb->xcp.cbr.crefs++;
+      ptcb->xcp.cbr->crefs++;
       ctcb->xcp.cbr = ptcb->xcp.cbr;
     }
 
@@ -333,7 +340,7 @@ FAR void *up_addrenv_instantiate(FAR _TCB *tcb)
   /* Get the current CBR value from the CBR register */
 
   flags = irqsave();
-  cbr = inp(Z180_MMU_CBR);
+  oldcbr = inp(Z180_MMU_CBR);
 
   /* Check if the task has an address environment. */
 
@@ -341,11 +348,11 @@ FAR void *up_addrenv_instantiate(FAR _TCB *tcb)
     {
       /* Yes.. Write the new CBR value into CBR register */
 
-      outp(Z180_MMU_CBR, tcb->xcp.cbr.cbr);
+      outp(Z180_MMU_CBR, tcb->xcp.cbr->cbr);
     }
 
   irqrestore(flags);
-  return (FAR void *)cbr;
+  return (FAR void *)oldcbr;
 }
 
 /****************************************************************************
@@ -368,6 +375,7 @@ int up_addrenv_restore(FAR void *handle)
   /* Restore the CBR value */
 
   outp(Z180_MMU_CBR, (uint8_t)handle);
+  return OK;
 }
 
 /****************************************************************************
diff --git a/nuttx/arch/z80/src/z180/z180_mmu.h b/nuttx/arch/z80/src/z180/z180_mmu.h
index 74463427a..69ee13cc5 100644
--- a/nuttx/arch/z80/src/z180/z180_mmu.h
+++ b/nuttx/arch/z80/src/z180/z180_mmu.h
@@ -109,12 +109,10 @@
 
 /* MMU register values */
 
-#define Z180_CBAR_VALUE \
-  ((((CONFIG_Z180_BANKAREA_VIRTBASE >> 12) & 0x0f) << CBAR_BA_SHIFT) \
-   (((CONFIG_Z180_COMMON1AREA_VIRTBASE >> 12) & 0x0f) << CBAR_CA_SHIFT))
-
-#define Z180_BBR_VALUE \
-  ((CONFIG_Z180_BANKAREA_PHYSBASE >> 12) & 0xff)
+#define Z180_CBAR_BA_VALUE  (((CONFIG_Z180_BANKAREA_VIRTBASE >> 12) & 0x0f) << CBAR_BA_SHIFT)
+#define Z180_CBAR_CA_VALUE  (((CONFIG_Z180_COMMON1AREA_VIRTBASE >> 12) & 0x0f) << CBAR_CA_SHIFT)
+#define Z180_CBAR_VALUE     (Z180_CBAR_BA_VALUE | Z180_CBAR_CA_VALUE)
+#define Z180_BBR_VALUE      ((CONFIG_Z180_BANKAREA_PHYSBASE >> 12) & 0xff)
 
 /****************************************************************************
  * Public Functions
@@ -139,11 +137,11 @@ void z180_mmu_lowinit(void) __naked;
  * Name: up_mmuinit
  *
  * Description:
- *   Perform higher level initializatin of the MMU and physical memory
- *   memory management logic.
+ *   Perform higher level initialization of the MMU and physical memory
+ *   memory management logic.  More correctly prototypes in up_internal.h.
  *
  ****************************************************************************/
 
-void up_mmuinit(void);
+int up_mmuinit(void);
 
 #endif /* __ARCH_Z80_SRC_Z180_Z180_MMU_H */