diff options
Diffstat (limited to 'arch/openrisc/cpu/cpu.c')
| -rw-r--r-- | arch/openrisc/cpu/cpu.c | 145 |
1 files changed, 0 insertions, 145 deletions
diff --git a/arch/openrisc/cpu/cpu.c b/arch/openrisc/cpu/cpu.c deleted file mode 100644 index 272656a361..0000000000 --- a/arch/openrisc/cpu/cpu.c +++ /dev/null @@ -1,145 +0,0 @@ -/* - * (C) Copyright 2011, Stefan Kristiansson <stefan.kristiansson@saunalahti.fi> - * (C) Copyright 2011, Julius Baxter <julius@opencores.org> - * - * SPDX-License-Identifier: GPL-2.0+ - */ - -#include <common.h> -#include <asm/system.h> -#include <asm/openrisc_exc.h> - -static volatile int illegal_instruction; - -static void illegal_instruction_handler(void) -{ - ulong *epcr = (ulong *)mfspr(SPR_EPCR_BASE); - - /* skip over the illegal instruction */ - mtspr(SPR_EPCR_BASE, (ulong)(++epcr)); - illegal_instruction = 1; -} - -static void checkinstructions(void) -{ - ulong ra = 1, rb = 1, rc; - - exception_install_handler(EXC_ILLEGAL_INSTR, - illegal_instruction_handler); - - illegal_instruction = 0; - asm volatile("l.mul %0,%1,%2" : "=r" (rc) : "r" (ra), "r" (rb)); - printf(" Hardware multiplier: %s\n", - illegal_instruction ? "no" : "yes"); - - illegal_instruction = 0; - asm volatile("l.div %0,%1,%2" : "=r" (rc) : "r" (ra), "r" (rb)); - printf(" Hardware divider: %s\n", - illegal_instruction ? "no" : "yes"); - - exception_free_handler(EXC_ILLEGAL_INSTR); -} - -int checkcpu(void) -{ - ulong upr = mfspr(SPR_UPR); - ulong vr = mfspr(SPR_VR); - ulong iccfgr = mfspr(SPR_ICCFGR); - ulong dccfgr = mfspr(SPR_DCCFGR); - ulong immucfgr = mfspr(SPR_IMMUCFGR); - ulong dmmucfgr = mfspr(SPR_DMMUCFGR); - ulong cpucfgr = mfspr(SPR_CPUCFGR); - uint ver = (vr & SPR_VR_VER) >> 24; - uint rev = vr & SPR_VR_REV; - uint block_size; - uint ways; - uint sets; - - printf("CPU: OpenRISC-%x00 (rev %d) @ %d MHz\n", - ver, rev, (CONFIG_SYS_CLK_FREQ / 1000000)); - - if (upr & SPR_UPR_DCP) { - block_size = (dccfgr & SPR_DCCFGR_CBS) ? 32 : 16; - ways = 1 << (dccfgr & SPR_DCCFGR_NCW); - printf(" D-Cache: %d bytes, %d bytes/line, %d way(s)\n", - checkdcache(), block_size, ways); - } else { - printf(" D-Cache: no\n"); - } - - if (upr & SPR_UPR_ICP) { - block_size = (iccfgr & SPR_ICCFGR_CBS) ? 32 : 16; - ways = 1 << (iccfgr & SPR_ICCFGR_NCW); - printf(" I-Cache: %d bytes, %d bytes/line, %d way(s)\n", - checkicache(), block_size, ways); - } else { - printf(" I-Cache: no\n"); - } - - if (upr & SPR_UPR_DMP) { - sets = 1 << ((dmmucfgr & SPR_DMMUCFGR_NTS) >> 2); - ways = (dmmucfgr & SPR_DMMUCFGR_NTW) + 1; - printf(" DMMU: %d sets, %d way(s)\n", - sets, ways); - } else { - printf(" DMMU: no\n"); - } - - if (upr & SPR_UPR_IMP) { - sets = 1 << ((immucfgr & SPR_IMMUCFGR_NTS) >> 2); - ways = (immucfgr & SPR_IMMUCFGR_NTW) + 1; - printf(" IMMU: %d sets, %d way(s)\n", - sets, ways); - } else { - printf(" IMMU: no\n"); - } - - printf(" MAC unit: %s\n", - (upr & SPR_UPR_MP) ? "yes" : "no"); - printf(" Debug unit: %s\n", - (upr & SPR_UPR_DUP) ? "yes" : "no"); - printf(" Performance counters: %s\n", - (upr & SPR_UPR_PCUP) ? "yes" : "no"); - printf(" Power management: %s\n", - (upr & SPR_UPR_PMP) ? "yes" : "no"); - printf(" Interrupt controller: %s\n", - (upr & SPR_UPR_PICP) ? "yes" : "no"); - printf(" Timer: %s\n", - (upr & SPR_UPR_TTP) ? "yes" : "no"); - printf(" Custom unit(s): %s\n", - (upr & SPR_UPR_CUP) ? "yes" : "no"); - - printf(" Supported instructions:\n"); - printf(" ORBIS32: %s\n", - (cpucfgr & SPR_CPUCFGR_OB32S) ? "yes" : "no"); - printf(" ORBIS64: %s\n", - (cpucfgr & SPR_CPUCFGR_OB64S) ? "yes" : "no"); - printf(" ORFPX32: %s\n", - (cpucfgr & SPR_CPUCFGR_OF32S) ? "yes" : "no"); - printf(" ORFPX64: %s\n", - (cpucfgr & SPR_CPUCFGR_OF64S) ? "yes" : "no"); - - checkinstructions(); - - return 0; -} - -int cleanup_before_linux(void) -{ - disable_interrupts(); - return 0; -} - -extern void __reset(void); - -int do_reset(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) -{ - disable_interrupts(); - /* Code the jump to __reset here as the compiler is prone to - emitting a bad jump instruction if the function is in flash */ - __asm__("l.movhi r1,hi(__reset); \ - l.ori r1,r1,lo(__reset); \ - l.jr r1"); - /* not reached, __reset does not return */ - return 0; -} |