Changeset 361635c in mainline for include

Timestamp:

2005-08-25T20:58:07Z (20 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

fde6429

Parents:

cfd6efd2

Message:

Preparations for weaker preemption model.
Make all kernel stacks (i.e. startup, scheduler and thread) be STACK_SIZE bytes long.
Reincarnate "the" structure. This time, it is planned to be located at the base of each and every kernel stack.
On IA-32 and MIPS, implement get_stack_base() functions. On the rest of supported platforms, define it to be dummy.

Location:

include

Files:

• arch.h (modified) (1 diff)
• config.h (modified) (1 diff)
• cpu.h (modified) (1 diff)
• proc/thread.h (modified) (1 diff)
• typedefs.h (modified) (1 diff)

include/arch.h

@@ -47 +47 @@
 #define TASK            (cpu_private_data[CPU_ID_ARCH].task)
 
+/*
+ * For each possible kernel stack, structure
+ * of the following type will be placed at
+ * the bottom of the stack.
+ */
+struct the {
+        int preemption_disabled;
+        thread_t *thread;               /* current thread */
+        task_t *task;                   /* current task */
+        cpu_t *cpu;                     /* executing cpu */
+};
+
 extern void arch_pre_mm_init(void);
 extern void arch_post_mm_init(void);

include/config.h

@@ -32 +32 @@
 #include <arch/types.h>
 #include <typedefs.h>
+#include <arch/mm/page.h>
+
+#define STACK_SIZE              PAGE_SIZE
 
 #define CONFIG_MEMORY_SIZE      4*1024*1024
 #define CONFIG_HEAP_SIZE        300*1024
-#define CONFIG_STACK_SIZE       32*1024
+#define CONFIG_STACK_SIZE       STACK_SIZE
 
 struct config {

include/cpu.h

@@ -40 +40 @@
 #include <typedefs.h>
 #include <arch/context.h>
+#include <config.h>
 
-#define CPU_STACK_SIZE  PAGE_SIZE
+#define CPU_STACK_SIZE  STACK_SIZE
 
 struct cpu {

include/proc/thread.h

@@ -40 +40 @@
 #include <synch/rwlock.h>
 #include <mm/page.h>
+#include <config.h>
 #include <list.h>
 
-#define THREAD_STACK_SIZE       PAGE_SIZE
+#define THREAD_STACK_SIZE       STACK_SIZE
 
 #define THREAD_USER_STACK       1

include/typedefs.h

@@ -72 +72 @@
 typedef char *char_ptr;
 
+typedef struct the the_t;
+
 #endif