diff options
| -rw-r--r-- | arch/xtensa/kernel/align.S | 34 | ||||
| -rw-r--r-- | arch/xtensa/kernel/traps.c | 3 | ||||
| -rw-r--r-- | arch/xtensa/platforms/iss/network.c | 3 |
3 files changed, 18 insertions, 22 deletions
diff --git a/arch/xtensa/kernel/align.S b/arch/xtensa/kernel/align.S index 20d6b4961001..ee97edce2300 100644 --- a/arch/xtensa/kernel/align.S +++ b/arch/xtensa/kernel/align.S @@ -1,7 +1,7 @@ /* * arch/xtensa/kernel/align.S * - * Handle unalignment exceptions in kernel space. + * Handle unalignment and load/store exceptions. * * This file is subject to the terms and conditions of the GNU General * Public License. See the file "COPYING" in the main directory of @@ -26,20 +26,18 @@ #define LOAD_EXCEPTION_HANDLER #endif -#if XCHAL_UNALIGNED_STORE_EXCEPTION || defined LOAD_EXCEPTION_HANDLER +#if XCHAL_UNALIGNED_STORE_EXCEPTION || defined CONFIG_XTENSA_LOAD_STORE +#define STORE_EXCEPTION_HANDLER +#endif + +#if defined LOAD_EXCEPTION_HANDLER || defined STORE_EXCEPTION_HANDLER #define ANY_EXCEPTION_HANDLER #endif -#if XCHAL_HAVE_WINDOWED +#if XCHAL_HAVE_WINDOWED && defined CONFIG_MMU #define UNALIGNED_USER_EXCEPTION #endif -/* First-level exception handler for unaligned exceptions. - * - * Note: This handler works only for kernel exceptions. Unaligned user - * access should get a seg fault. - */ - /* Big and little endian 16-bit values are located in * different halves of a register. HWORD_START helps to * abstract the notion of extracting a 16-bit value from a @@ -228,8 +226,6 @@ ENDPROC(fast_load_store) #ifdef ANY_EXCEPTION_HANDLER ENTRY(fast_unaligned) -#if XCHAL_UNALIGNED_LOAD_EXCEPTION || XCHAL_UNALIGNED_STORE_EXCEPTION - call0 .Lsave_and_load_instruction /* Analyze the instruction (load or store?). */ @@ -244,8 +240,7 @@ ENTRY(fast_unaligned) /* 'store indicator bit' not set, jump */ _bbci.l a4, OP1_SI_BIT + INSN_OP1, .Lload -#endif -#if XCHAL_UNALIGNED_STORE_EXCEPTION +#ifdef STORE_EXCEPTION_HANDLER /* Store: Jump to table entry to get the value in the source register.*/ @@ -254,7 +249,7 @@ ENTRY(fast_unaligned) addx8 a5, a6, a5 jx a5 # jump into table #endif -#if XCHAL_UNALIGNED_LOAD_EXCEPTION +#ifdef LOAD_EXCEPTION_HANDLER /* Load: Load memory address. */ @@ -328,7 +323,7 @@ ENTRY(fast_unaligned) mov a14, a3 ; _j .Lexit; .align 8 mov a15, a3 ; _j .Lexit; .align 8 #endif -#if XCHAL_UNALIGNED_STORE_EXCEPTION +#ifdef STORE_EXCEPTION_HANDLER .Lstore_table: l32i a3, a2, PT_AREG0; _j .Lstore_w; .align 8 mov a3, a1; _j .Lstore_w; .align 8 # fishy?? @@ -348,7 +343,6 @@ ENTRY(fast_unaligned) mov a3, a15 ; _j .Lstore_w; .align 8 #endif -#ifdef ANY_EXCEPTION_HANDLER /* We cannot handle this exception. */ .extern _kernel_exception @@ -377,8 +371,8 @@ ENTRY(fast_unaligned) 2: movi a0, _user_exception jx a0 -#endif -#if XCHAL_UNALIGNED_STORE_EXCEPTION + +#ifdef STORE_EXCEPTION_HANDLER # a7: instruction pointer, a4: instruction, a3: value .Lstore_w: @@ -444,7 +438,7 @@ ENTRY(fast_unaligned) s32i a6, a4, 4 #endif #endif -#ifdef ANY_EXCEPTION_HANDLER + .Lexit: #if XCHAL_HAVE_LOOPS rsr a4, lend # check if we reached LEND @@ -539,7 +533,7 @@ ENTRY(fast_unaligned) __src_b a4, a4, a5 # a4 has the instruction ret -#endif + ENDPROC(fast_unaligned) ENTRY(fast_unaligned_fixup) diff --git a/arch/xtensa/kernel/traps.c b/arch/xtensa/kernel/traps.c index 17eb180eff7c..427c125a137a 100644 --- a/arch/xtensa/kernel/traps.c +++ b/arch/xtensa/kernel/traps.c @@ -102,7 +102,8 @@ static dispatch_init_table_t __initdata dispatch_init_table[] = { #endif { EXCCAUSE_INTEGER_DIVIDE_BY_ZERO, 0, do_div0 }, /* EXCCAUSE_PRIVILEGED unhandled */ -#if XCHAL_UNALIGNED_LOAD_EXCEPTION || XCHAL_UNALIGNED_STORE_EXCEPTION +#if XCHAL_UNALIGNED_LOAD_EXCEPTION || XCHAL_UNALIGNED_STORE_EXCEPTION || \ + IS_ENABLED(CONFIG_XTENSA_LOAD_STORE) #ifdef CONFIG_XTENSA_UNALIGNED_USER { EXCCAUSE_UNALIGNED, USER, fast_unaligned }, #endif diff --git a/arch/xtensa/platforms/iss/network.c b/arch/xtensa/platforms/iss/network.c index 9ac46ab3a296..85c82cd42188 100644 --- a/arch/xtensa/platforms/iss/network.c +++ b/arch/xtensa/platforms/iss/network.c @@ -237,7 +237,7 @@ static int tuntap_probe(struct iss_net_private *lp, int index, char *init) init += sizeof(TRANSPORT_TUNTAP_NAME) - 1; if (*init == ',') { - rem = split_if_spec(init + 1, &mac_str, &dev_name); + rem = split_if_spec(init + 1, &mac_str, &dev_name, NULL); if (rem != NULL) { pr_err("%s: extra garbage on specification : '%s'\n", dev->name, rem); @@ -540,6 +540,7 @@ static void iss_net_configure(int index, char *init) rtnl_unlock(); pr_err("%s: error registering net device!\n", dev->name); platform_device_unregister(&lp->pdev); + /* dev is freed by the iss_net_pdev_release callback */ return; } rtnl_unlock(); |