diff options
Diffstat (limited to 'cpu/bf533/cplbhdlr.S')
| -rw-r--r-- | cpu/bf533/cplbhdlr.S | 193 |
1 files changed, 0 insertions, 193 deletions
diff --git a/cpu/bf533/cplbhdlr.S b/cpu/bf533/cplbhdlr.S deleted file mode 100644 index 61be5bb90c..0000000000 --- a/cpu/bf533/cplbhdlr.S +++ /dev/null @@ -1,193 +0,0 @@ -/* Copyright (C) 2003 Analog Devices, Inc. All Rights Reserved. - * - * This file is subject to the terms and conditions of the GNU General Public - * License. - * - * Blackfin BF533/2.6 support : LG Soft India - */ - - -/* Include an exception handler to invoke the CPLB manager - */ - -#include <asm-blackfin/linkage.h> -#include <asm/cplb.h> -#include <asm/entry.h> - - -.text - -.globl _cplb_hdr; -.type _cplb_hdr, STT_FUNC; -.extern _cplb_mgr; -.type _cplb_mgr, STT_FUNC; -.extern __unknown_exception_occurred; -.type __unknown_exception_occurred, STT_FUNC; -.extern __cplb_miss_all_locked; -.type __cplb_miss_all_locked, STT_FUNC; -.extern __cplb_miss_without_replacement; -.type __cplb_miss_without_replacement, STT_FUNC; -.extern __cplb_protection_violation; -.type __cplb_protection_violation, STT_FUNC; -.extern panic_pv; - -.align 2; - -ENTRY(_cplb_hdr) - SSYNC; - [--SP] = ( R7:0, P5:0 ); - [--SP] = ASTAT; - [--SP] = SEQSTAT; - [--SP] = I0; - [--SP] = I1; - [--SP] = I2; - [--SP] = I3; - [--SP] = LT0; - [--SP] = LB0; - [--SP] = LC0; - [--SP] = LT1; - [--SP] = LB1; - [--SP] = LC1; - R2 = SEQSTAT; - - /*Mask the contents of SEQSTAT and leave only EXCAUSE in R2*/ - R2 <<= 26; - R2 >>= 26; - - R1 = 0x23; /* Data access CPLB protection violation */ - CC = R2 == R1; - IF !CC JUMP not_data_write; - R0 = 2; /* is a write to data space*/ - JUMP is_icplb_miss; - -not_data_write: - R1 = 0x2C; /* CPLB miss on an instruction fetch */ - CC = R2 == R1; - R0 = 0; /* is_data_miss == False*/ - IF CC JUMP is_icplb_miss; - - R1 = 0x26; - CC = R2 == R1; - IF !CC JUMP unknown; - - R0 = 1; /* is_data_miss == True*/ - -is_icplb_miss: - -#if ( defined (CONFIG_BLKFIN_CACHE) || defined (CONFIG_BLKFIN_DCACHE)) -#if ( defined (CONFIG_BLKFIN_CACHE) && !defined (CONFIG_BLKFIN_DCACHE)) - R1 = CPLB_ENABLE_ICACHE; -#endif -#if ( !defined (CONFIG_BLKFIN_CACHE) && defined (CONFIG_BLKFIN_DCACHE)) - R1 = CPLB_ENABLE_DCACHE; -#endif -#if ( defined (CONFIG_BLKFIN_CACHE) && defined (CONFIG_BLKFIN_DCACHE)) - R1 = CPLB_ENABLE_DCACHE | CPLB_ENABLE_ICACHE; -#endif -#else - R1 = 0; -#endif - - [--SP] = RETS; - CALL _cplb_mgr; - RETS = [SP++]; - CC = R0 == 0; - IF !CC JUMP not_replaced; - LC1 = [SP++]; - LB1 = [SP++]; - LT1 = [SP++]; - LC0 = [SP++]; - LB0 = [SP++]; - LT0 = [SP++]; - I3 = [SP++]; - I2 = [SP++]; - I1 = [SP++]; - I0 = [SP++]; - SEQSTAT = [SP++]; - ASTAT = [SP++]; - ( R7:0, P5:0 ) = [SP++]; - RTS; - -unknown: - [--SP] = RETS; - CALL __unknown_exception_occurred; - RETS = [SP++]; - JUMP unknown; -not_replaced: - CC = R0 == CPLB_NO_UNLOCKED; - IF !CC JUMP next_check; - [--SP] = RETS; - CALL __cplb_miss_all_locked; - RETS = [SP++]; -next_check: - CC = R0 == CPLB_NO_ADDR_MATCH; - IF !CC JUMP next_check2; - [--SP] = RETS; - CALL __cplb_miss_without_replacement; - RETS = [SP++]; - JUMP not_replaced; -next_check2: - CC = R0 == CPLB_PROT_VIOL; - IF !CC JUMP strange_return_from_cplb_mgr; - [--SP] = RETS; - CALL __cplb_protection_violation; - RETS = [SP++]; - JUMP not_replaced; -strange_return_from_cplb_mgr: - IDLE; - CSYNC; - JUMP strange_return_from_cplb_mgr; - -/************************************ - * Diagnostic exception handlers - */ - -__cplb_miss_all_locked: - sp += -12; - R0 = CPLB_NO_UNLOCKED; - call panic_bfin; - SP += 12; - RTS; - - __cplb_miss_without_replacement: - sp += -12; - R0 = CPLB_NO_ADDR_MATCH; - call panic_bfin; - SP += 12; - RTS; - -__cplb_protection_violation: - sp += -12; - R0 = CPLB_PROT_VIOL; - call panic_bfin; - SP += 12; - RTS; - -__unknown_exception_occurred: - - /* This function is invoked by the default exception - * handler, if it does not recognise the kind of - * exception that has occurred. In other words, the - * default handler only handles some of the system's - * exception types, and it does not expect any others - * to occur. If your application is going to be using - * other kinds of exceptions, you must replace the - * default handler with your own, that handles all the - * exceptions you will use. - * - * Since there's nothing we can do, we just loop here - * at what we hope is a suitably informative label. - */ - - IDLE; -do_not_know_what_to_do: - CSYNC; - JUMP __unknown_exception_occurred; - - RTS; -.__unknown_exception_occurred.end: -.global __unknown_exception_occurred; -.type __unknown_exception_occurred, STT_FUNC; - -panic_bfin: - RTS; |