[commit] r1360 - in trunk/openbios-devel: arch/sparc64 include/arch/sparc64

[repository service]

Author: mcayland
Date: Tue Dec 29 16:50:29 2015
New Revision: 1360
URL: http://tracker.coreboot.org/trac/openbios/changeset/1360

Log:
SPARC64: introduce new Forth context stack (fcstack) for CPU contexts

The fcstack holds a stack of complete CPU states which can be used to enable
re-entrant calls into Forth (e.g. when processing interrupts).

Signed-off-by: Mark Cave-Ayland

Modified:
   trunk/openbios-devel/arch/sparc64/context.c
   trunk/openbios-devel/arch/sparc64/ldscript
   trunk/openbios-devel/include/arch/sparc64/io.h

Modified: trunk/openbios-devel/arch/sparc64/context.c
==============================================================================
--- trunk/openbios-devel/arch/sparc64/context.c	Tue Dec 29 16:50:24 2015	(r1359)
+++ trunk/openbios-devel/arch/sparc64/context.c	Tue Dec 29 16:50:29 2015	(r1360)
@@ -40,6 +40,10 @@
 /* Pointer to startup context (physical address) */
 unsigned long __boot_ctx;

+/* Pointer to Forth context stack */
+void *_fcstack_ptr = &_efcstack;
+
+
 /*
  * Main starter
  * This is the C function that runs first.

Modified: trunk/openbios-devel/arch/sparc64/ldscript
==============================================================================
--- trunk/openbios-devel/arch/sparc64/ldscript	Tue Dec 29 16:50:24 2015	(r1359)
+++ trunk/openbios-devel/arch/sparc64/ldscript	Tue Dec 29 16:50:29 2015	(r1360)
@@ -50,6 +50,11 @@
    *(.bss.*)
    *(COMMON)

+	_fcstack = .;
+	. += 32768;
+	. = ALIGN(16);
+	_efcstack = .;
+	
    _stack = .;
    . += STACK_SIZE;
    . = ALIGN(16);

Modified: trunk/openbios-devel/include/arch/sparc64/io.h
==============================================================================
--- trunk/openbios-devel/include/arch/sparc64/io.h	Tue Dec 29 16:50:24 2015	(r1359)
+++ trunk/openbios-devel/include/arch/sparc64/io.h	Tue Dec 29 16:50:29 2015	(r1360)
@@ -9,7 +9,7 @@

extern unsigned long va_shift; // Set in entry.S
 // Defined in ldscript
-extern char _start, _data, _stack, _estack, _end, _iomem;
+extern char _start, _data, _stack, _estack, _fcstack, _efcstack, _end, _iomem;

// XXX check use and merge
 #define phys_to_virt(phys) ((void *) ((unsigned long) (phys)))