From 6e1715f7c34d00dc94f3cecb2526ae3ff0b0649f Mon Sep 17 00:00:00 2001 From: "Maciej W. Rozycki" Date: Fri, 22 Jan 2016 05:21:13 +0000 Subject: [PATCH] MIPS: math-emu: dsemul: Correct description of the emulation frame Remove irrelevant content from the description of the emulation frame in `mips_dsemul', referring to bare-metal configurations. Update the text, reflecting the change made with commit ba3049ed4086 ("MIPS: Switch FPU emulator trap to BREAK instruction."), where we switched from using an address error exception on an unaligned access to the use of a BREAK 514 instruction causing a breakpoint exception instead. Signed-off-by: Maciej W. Rozycki Cc: Aurelien Jarno Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/12176/ Signed-off-by: Ralf Baechle --- arch/mips/math-emu/dsemul.c | 9 ++------- 1 file changed, 2 insertions(+), 7 deletions(-) diff --git a/arch/mips/math-emu/dsemul.c b/arch/mips/math-emu/dsemul.c index 77a623db3b38..bca7c4367ca4 100644 --- a/arch/mips/math-emu/dsemul.c +++ b/arch/mips/math-emu/dsemul.c @@ -78,13 +78,8 @@ int mips_dsemul(struct pt_regs *regs, mips_instruction ir, unsigned long cpc) * Algorithmics used a system call instruction, and * borrowed that vector. MIPS/Linux version is a bit * more heavyweight in the interests of portability and - * multiprocessor support. For Linux we generate a - * an unaligned access and force an address error exception. - * - * For embedded systems (stand-alone) we prefer to use a - * non-existing CP1 instruction. This prevents us from emulating - * branches, but gives us a cleaner interface to the exception - * handler (single entry point). + * multiprocessor support. For Linux we use a BREAK 514 + * instruction causing a breakpoint exception. */ break_math = BREAK_MATH(get_isa16_mode(regs->cp0_epc));