diff options
Diffstat (limited to '')
| -rw-r--r-- | c/src/lib/libbsp/sparc/leon/startup/boardinit.S | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/c/src/lib/libbsp/sparc/leon/startup/boardinit.S b/c/src/lib/libbsp/sparc/leon/startup/boardinit.S new file mode 100644 index 0000000000..54fa6f576b --- /dev/null +++ b/c/src/lib/libbsp/sparc/leon/startup/boardinit.S @@ -0,0 +1,64 @@ +/* + * boardinit.s + * + * Start code for the LEON. + * + * $Id$ + */ + +#include <asm.h> +#include <leon.h> + + .global __bsp_board_init + +__bsp_board_init: + +/* Check if LEON is initialised. If not, this means that we are + running on the simulator. Initiate some of the parameters + that are done by the boot-prom otherwise. +*/ + + set SYM(LEON_REG), %l0 ! %l0 = base address of peripherals + ld [%l0+LEON_REG_CACHECTRL_OFFSET], %l1 ! Check if LEON has been initialised + andcc %l1, 3, %g0 + bne 2f + nop + + + flush + set 0x1000f, %l1 + st %l1, [%l0 + LEON_REG_CACHECTRL_OFFSET] ! enable caches + ld [%l0 + LEON_REG_SIM_ROM_SIZE_OFFSET], %g1 ! load simulator rom size + clr %l2 + srl %g1, 13, %g1 ! calculate appropriate rom size +1: + srl %g1, 1, %g1 + tst %g1 + bne,a 1b + inc %l2 + sll %l2, 14, %l2 + st %l2, [%l0 + LEON_REG_MEMCFG1_OFFSET] ! set prom size in memcfg1 + + set 0, %l2 + ld [%l0 + LEON_REG_SIM_RAM_SIZE_OFFSET], %g2 ! load simulator ram size + srl %g2, 13, %g1 ! calculate appropriate ram size +1: + srl %g1, 1, %g1 + tst %g1 + bne,a 1b + inc %l2 + sll %l2, 9, %l2 + st %l2, [%l0 + LEON_REG_MEMCFG2_OFFSET] ! set ram size in memcfg2 + + set SYM(RAM_START), %l1 ! Cannot use RAM_END due to bug in linker + set SYM(RAM_SIZE), %l2 + add %l1, %l2, %sp + set 49, %l2 + st %l2, [%l0 + LEON_REG_SCALER_LOAD_OFFSET] ! scaler reload register + st %l2, [%l0 + LEON_REG_SCALERCNT_OFFSET] ! scaler counter register + +2: + retl + nop + +/* end of file */ |