Changeset 624 for trunk/hal/tsar_mips32/kernel.ld

Timestamp:

Mar 12, 2019, 1:37:38 PM (5 years ago)

Author:

alain

Message:

Fix several bugs to use the instruction MMU in kernel mode
in replacement of the instruction address extension register,
and remove the "kentry" segment.

This version is running on the tsar_generic_iob" platform.

One interesting bug: the cp0_ebase defining the kernel entry point
(for interrupts, exceptions and syscalls) must be initialized
early in kernel_init(), because the VFS initialisation done by
kernel_ini() uses RPCs, and RPCs uses Inter-Processor-Interrup.

File:

• trunk/hal/tsar_mips32/kernel.ld (modified) (4 diffs)

trunk/hal/tsar_mips32/kernel.ld

@@ -1 +1 @@
 /***************************************************************************************
  * This is the linker script for the ALMOS-MKH kernel code on the TSAR architecture.
- * It describes the memory layout for the "kernel.elf" binary file, containing three 
+ * It describes the memory layout for the "kernel.elf" binary file, containing the two 
  * loadable segments, that MUST be identity mapped for the TSAR architecture. 
  * 
- * WARNING : the seg_kentry_base and seg_kcode_base defined below must be coherent
+ * WARNING : the seg_kcode_base defined below must be coherent
  * with the values defined in the boot_config.h file used by the TSAR bootloader. 
  **************************************************************************************/
@@ -10 +10 @@
 /* Define the kernel code base addresses */
 
-seg_kcode_base  = 0x00008000;
-seg_kentry_base = 0x00004000;
+seg_kcode_base  = 0x00004000;
 
-/* Set the entry point (e_entry field in the "kernel.elf" file header) */
+/* Define the e_entry field in the "kernel.elf" file header) */
 
 ENTRY(kernel_init)
@@ -24 +23 @@
         seg_kcode :
         {
+                *(.kentry)
+                *(.switch)
                 *(.text)
                 *(.rodata*)
@@ -35 +36 @@
                 *(.kidle)
                 *(.kdata*)
+        *(.scommon)
+        *(.bss)
+        *(.eh*)
                 *(.data*)
         }
-
-    . = seg_kentry_base;
-    seg_kentry :
-    {
-                *(.kentry)
-                *(.switch)
-    }
 }