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New UTCB implementation almost working.

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- KIP's pointer to UTCB seems to work with existing l4lib ipc functions.
- Works up to clone()
- In clone we mmap() the same UTCB on each new thread - excessive.
- Generally during page fault handling, cloned threads may fault on the same page
  multiple times even though a single handling would be enough for all of them.
  Need to detect and handle this.
This commit is contained in:
Bahadir Balban
2009-05-01 10:11:47 +03:00
parent 7a81db8782
commit cada0f8f18
31 changed files with 297 additions and 188 deletions
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3
include/l4/api/exregs.h
View File

@@ -20,8 +20,7 @@ struct exregs_data {
u32 valid_vect;
u32 flags;
l4id_t pagerid;
unsigned long utcb_phys;
unsigned long utcb_virt;
unsigned long utcb_address;
};

5
include/l4/generic/tcb.h
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@@ -72,8 +72,7 @@ struct ktcb {
struct list_head task_list; /* Global task list. */
/* UTCB related, see utcb.txt in docs */
unsigned long utcb_virt; /* Virtual ref to task's utcb area */
unsigned long utcb_phys; /* Physical ref to task's utcb area */
unsigned long utcb_address; /* Virtual ref to task's utcb area */
/* Thread times */
u32 kernel_time; /* Ticks spent in kernel */
@@ -151,5 +150,7 @@ extern struct id_pool *thread_id_pool;
extern struct id_pool *space_id_pool;
extern struct id_pool *tgroup_id_pool;
void task_update_utcb(struct ktcb *cur, struct ktcb *next);
#endif /* __TCB_H__ */

2
include/l4/glue/arm/memlayout.h
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@@ -33,7 +33,7 @@
#define UTCB_AREA_START 0xF8000000
#define UTCB_AREA_END 0xF9000000
#define UTCB_AREA_SIZE (UTCB_AREA_END - UTCB_AREA_START)
#define UTCB_AREA_SECTIONS (UTCB_AREA_SIZE / ARM_SECTION_SIZE)
#define UTCB_SIZE (sizeof(int) * 64)
#define IO_AREA_START 0xF9000000
#define IO_AREA_END 0xFF000000

4
include/l4/glue/arm/message.h
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@@ -6,7 +6,9 @@
#ifndef __GLUE_ARM_MESSAGE_H__
#define __GLUE_ARM_MESSAGE_H__
#define MR_REST 56
#include INC_GLUE(memlayout.h)
#define MR_REST (UTCB_SIZE - MR_TOTAL - 2) /* -2 is for fields on utcb */
#define MR_TOTAL 6
#define MR_TAG 0 /* Contains the purpose of message */
#define MR_SENDER 1 /* For anythread receivers to discover sender */