Changeset 625 for trunk/hal/tsar_mips32/core/hal_uspace.c

Timestamp:

Apr 10, 2019, 10:09:39 AM (5 years ago)

Author:

alain

Message:

Fix a bug in the vmm_remove_vseg() function: the physical pages
associated to an user DATA vseg were released to the kernel when
the target process descriptor was in the reference cluster.
This physical pages release should be done only when the page
forks counter value is zero.
All other modifications are cosmetic.

File:

• trunk/hal/tsar_mips32/core/hal_uspace.c (modified) (1 diff)

trunk/hal/tsar_mips32/core/hal_uspace.c

@@ -249 +249 @@
         ".set noreorder             \n"
         "move   $13,   %1           \n"   /* $13 <= str                     */
-        "mfc2   $15,   $1           \n"   /* $15 <= DTLB and ITLB off       */
+        "mfc2   $15,   $1           \n"   /* $15 <= MMU_MODE (DTLB off)     */
         "ori    $14,   $15,  0x4    \n"   /* $14 <= mode DTLB on            */
         "1:                         \n"
         "mtc2   $14,   $1                       \n"   /* set DTLB on                    */
-        "lb         $12,   0($13)       \n"   /* read char from user space      */
+        "lb         $12,   0($13)       \n"   /* $12 <= one byte from u_space   */
         "mtc2   $15,   $1                       \n"   /* set DTLB off                   */
         "addi   $13,   $13,  1      \n"   /* increment address              */