sparc: Update startup code to take PIC mode into account

[people/ms/u-boot.git] / arch / sparc / cpu / leon3 / start.S

diff --git a/arch/sparc/cpu/leon3/start.S b/arch/sparc/cpu/leon3/start.S
index 5f904faf71ee88008961dc812c69049339fe78d0..be9b3fb20b0b84a89a83c2c760564a09902cf91f 100644 (file)
--- a/arch/sparc/cpu/leon3/start.S
+++ b/arch/sparc/cpu/leon3/start.S
@@ -57,6 +57,27 @@ MINFRAME = (WINDOWSIZE + ARGPUSHSIZE + 4)
 #error Must define number of SPARC register windows, default is 8
 #endif
 
+/* Macros to load address into a register. Uses GOT table for PIC */
+#ifdef __PIC__
+
+#define SPARC_PIC_THUNK_CALL(reg) \
+       sethi   %pc22(_GLOBAL_OFFSET_TABLE_-4), %##reg; \
+       call    __sparc_get_pc_thunk.reg; \
+        add    %##reg, %pc10(_GLOBAL_OFFSET_TABLE_+4), %##reg;
+
+#define SPARC_LOAD_ADDRESS(sym, got, reg) \
+       sethi   %gdop_hix22(sym), %##reg; \
+       xor     %##reg, %gdop_lox10(sym), %##reg; \
+       ld      [%##got + %##reg], %##reg, %gdop(sym);
+
+#else
+
+#define SPARC_PIC_THUNK_CALL(reg)
+#define SPARC_LOAD_ADDRESS(sym, got, tmp) \
+       set     sym, %##reg;
+
+#endif
+
 #define STACK_ALIGN    8
 #define SA(X)  (((X)+(STACK_ALIGN-1)) & ~(STACK_ALIGN-1))
 
@@ -229,7 +250,7 @@ clear_window:
        bge     clear_window
        save
 
-wininit:
+wiminit:
        set     WIM_INIT, %g3
        mov     %g3, %wim
 
@@ -240,7 +261,7 @@ stackp:
 
 cpu_init_unreloc:
        call    cpu_init_f
-       nop
+        nop
 
 /* un relocated start address of monitor */
 #define TEXT_START _text
@@ -248,9 +269,10 @@ cpu_init_unreloc:
 /* un relocated end address of monitor */
 #define DATA_END __init_end
 
+       SPARC_PIC_THUNK_CALL(l7)
 reloc:
-       set     TEXT_START,%g2
-       set     DATA_END,%g3
+       SPARC_LOAD_ADDRESS(TEXT_START, l7, g2)
+       SPARC_LOAD_ADDRESS(DATA_END, l7, g3)
        set     CONFIG_SYS_RELOC_MONITOR_BASE,%g4
 reloc_loop:
        ldd     [%g2],%l0
@@ -260,7 +282,7 @@ reloc_loop:
        inc     16,%g2
        subcc   %g3,%g2,%g0
        bne     reloc_loop
-       inc     16,%g4
+        inc    16,%g4
 
        clr     %l0
        clr     %l1
@@ -277,8 +299,8 @@ reloc_loop:
 
 clr_bss:
 /* clear bss area (the relocated) */
-       set     __bss_start,%g2
-       set     __bss_end,%g3
+       SPARC_LOAD_ADDRESS(__bss_start, l7, g2)
+       SPARC_LOAD_ADDRESS(__bss_end, l7, g3)
        sub     %g3,%g2,%g3
        add     %g3,%g4,%g3
        clr     %g1     /* std %g0 uses g0 and g1 */
@@ -289,19 +311,19 @@ clr_bss_16:
        inc     16,%g4
        cmp     %g3,%g4
        bne     clr_bss_16
-       nop
+        nop
 
 /* add offsets to GOT table */
 fixup_got:
-       set     __got_start,%g4
-       set     __got_end,%g3
+       SPARC_LOAD_ADDRESS(__got_start, l7, g4)
+       SPARC_LOAD_ADDRESS(__got_end, l7, g3)
 /*
  * new got offset = (old GOT-PTR (read with ld) -
  *   CONFIG_SYS_RELOC_MONITOR_BASE(from define) ) +
  *   Destination Address (from define)
  */
        set     CONFIG_SYS_RELOC_MONITOR_BASE,%g2
-       set     TEXT_START, %g1
+       SPARC_LOAD_ADDRESS(TEXT_START, l7, g1)
        add     %g4,%g2,%g4
        sub     %g4,%g1,%g4
        add     %g3,%g2,%g3
@@ -316,11 +338,11 @@ got_loop:
        inc     4,%g4
        cmp     %g3,%g4
        bne     got_loop
-       nop
+        nop
 
 prom_relocate:
-       set     __prom_start, %g2
-       set     __prom_end, %g3
+       SPARC_LOAD_ADDRESS(__prom_start, l7, g2)
+       SPARC_LOAD_ADDRESS(__prom_end, l7, g3)
        set     CONFIG_SYS_PROM_OFFSET, %g4
 
 prom_relocate_loop:
@@ -331,7 +353,7 @@ prom_relocate_loop:
        inc     16,%g2
        subcc   %g3,%g2,%g0
        bne     prom_relocate_loop
-       inc     16,%g4
+        inc    16,%g4
 
 /* Trap table has been moved, lets tell CPU about
  * the new trap table address
@@ -358,19 +380,19 @@ snoop_detect:
        nop
 /* Call relocated init functions */
 jump:
-       set     cpu_init_f2,%o1
+       SPARC_LOAD_ADDRESS(cpu_init_f2, l7, o1)
        set     CONFIG_SYS_RELOC_MONITOR_BASE,%o2
        add     %o1,%o2,%o1
        sub     %o1,%g1,%o1
        call    %o1
-       clr     %o0
+        clr    %o0
 
-       set     board_init_f,%o1
+       SPARC_LOAD_ADDRESS(board_init_f, l7, o1)
        set     CONFIG_SYS_RELOC_MONITOR_BASE,%o2
        add     %o1,%o2,%o1
        sub     %o1,%g1,%o1
        call    %o1
-       clr     %o0
+        clr    %o0
 
 dead:  ta 0                            ! if call returns...
        nop