diff options
Diffstat (limited to 'libgloss/sparc_leon/locore.S')
| -rw-r--r-- | libgloss/sparc_leon/locore.S | 170 |
1 files changed, 0 insertions, 170 deletions
diff --git a/libgloss/sparc_leon/locore.S b/libgloss/sparc_leon/locore.S deleted file mode 100644 index 011711bc0..000000000 --- a/libgloss/sparc_leon/locore.S +++ /dev/null @@ -1,170 +0,0 @@ -/* - * Copyright (c) 2011 Aeroflex Gaisler - * - * BSD license: - * - * Permission is hereby granted, free of charge, to any person obtaining a copy - * of this software and associated documentation files (the "Software"), to deal - * in the Software without restriction, including without limitation the rights - * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell - * copies of the Software, and to permit persons to whom the Software is - * furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included in - * all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR - * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL - * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER - * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, - * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN - * THE SOFTWARE. - */ - - -/* The traptable has to be the first code in a boot PROM. */ - -#include <asm-leon/head.h> - -#define TRAP(H) mov %psr, %l0; sethi %hi(H), %l4; jmp %l4+%lo(H); nop; -#define TRAPL(H) nop; sethi %hi(H), %g1; jmp %g1+%lo(H); nop; -#define TRAP_ENTRY(H) rd %psr, %l0; b H; rd %wim, %l3; nop; - -#define WIM_INIT 2 -#ifdef _SOFT_FLOAT -#define PSR_INIT 0x0e0 -#else -#define PSR_INIT 0x10e0 -#endif - -#define NUMREGWINDOWS 8 - -/* Unexcpected trap will halt the processor by forcing it to error state */ -#define BAD_TRAP ta 0; nop; nop; nop; - -/* Software trap. Treat as BAD_TRAP */ -#define SOFT_TRAP BAD_TRAP - - .seg "text" - .global _trap_table, start, _start, cpuinit, leonbare_irq_entry, _hardreset - .global _window_overflow, _window_underflow, _flush_windows, _fpdis_enable - /*.global _nwindows, _leon_version, _nwindows_min1*/ - - -! -! Startup code for standalone system. Wash IU and FPU (if present) registers. -! The registers have to be written to initiate the parity bits. -! - .section .text - /* ------- */ - .weak _hardreset - .set _hardreset,_hardreset_libgloss - /* ------- */ - - .global _hardreset_custom_weak, _hardreset_real, _cleanregs_custom_weak, _hardreset_custom_svt_weak - -_hardreset_real: - nop -_hardreset_libgloss: - set _hardreset_custom_weak, %g1 ! possible mkprom init code here, default links to dummy _hardreset_custom_dummy - call %g1 - nop - - set _trap_table, %g1 ! Initialize TBR - mov %g1, %tbr - - set _hardreset_custom_svt_weak, %g1 ! give mkprom svt chance to reset tbr - call %g1 - nop - - set _cleanregs_custom_weak, %g1 - call %g1 - nop - -#ifdef _FLAT - mov %g0, %wim -#else -/* ! assume that %sp is correct use cwp of psr to set the next window as invalid - mov %psr, %g2 ! extract cwp - and 0x1f, %g2,%g2 - set 0x1, %g3 - sll %g3,%g2,%g3 ! the bit mask for cwp - - sll %g3, 1, %g4 ! rotate one to left - sethi %hi(_nwindows_min1), %g5 ! NWINDOWS-1 - ld [%g5+%lo(_nwindows_min1)], %g5 - srl %g3, %g5, %g5 - or %g5, %g4, %g5 - mov %g5, %wim - nop; nop; nop */ -#endif - -/* - mov %psr, %g2 - set 0x202, %g3 - sll %g3, %g2, %g2 - mov %g2, %wim - nop; nop; nop -1: -*/ - ! ------------------------------- - ! only cpu 0 initializes -/* mov %psr, %g5 - srl %g5, 24, %g5 - and %g5, 3, %g5 - subcc %g5, 3, %g0 ! leon2: 0 or 2, leon3: 3 - bne callcpuinit - nop -*/ - - rd %asr17,%g5 - srl %g5,28,%g5 - cmp %g5,%g0 - bne slavego - nop - -callcpuinit: - call cpuinit - nop - - call pnpinit - nop - -slavego: - ! ------------------------------- - - sub %sp, 0x40, %sp ! room for main to save args - call _start - nop - - mov 1, %g1 - ta 0 ! Halt if _main would return ... - nop - - .global _fpdis,_fpdis_svt -_fpdis_svt: -_fpdis: - set 0x1000, %l4 - andcc %l0, %l4, %l3 - bne,a 4f - andn %l0, %l4, %l0 - ta 0 -4: - mov %l0, %psr ! restore %psr - nop; nop; nop - jmp %l2 ! Jump to nPC - rett %l2 + 4 - - -/* -!'''''''''''''''''''''''''''''''''''''''''''''''''''''''''''' - .section .bss - .global _nwindows, _leon_version, _nwindows_min1 -_nwindows: - .word 8 -_nwindows_min1: - .word 7 -_leon_version: - .word 3 -*/ |