diff options
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm/Kconfig | 7 | ||||
| -rw-r--r-- | arch/arm/vfp/vfp.h | 4 | ||||
| -rw-r--r-- | arch/arm/vfp/vfphw.S | 22 | ||||
| -rw-r--r-- | arch/arm/vfp/vfpinstr.h | 6 |
4 files changed, 31 insertions, 8 deletions
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index a04f507e7f2c..f4eeb03bc6a9 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -951,7 +951,7 @@ config FPE_FASTFPE config VFP bool "VFP-format floating point maths" - depends on CPU_V6 || CPU_ARM926T + depends on CPU_V6 || CPU_ARM926T || CPU_V7 help Say Y to include VFP support code in the kernel. This is needed if your hardware includes a VFP unit. @@ -961,6 +961,11 @@ config VFP Say N if your target does not have VFP hardware. +config VFPv3 + bool + depends on VFP + default y if CPU_V7 + endmenu menu "Userspace binary formats" diff --git a/arch/arm/vfp/vfp.h b/arch/arm/vfp/vfp.h index 791d0238c68f..c85860bad585 100644 --- a/arch/arm/vfp/vfp.h +++ b/arch/arm/vfp/vfp.h @@ -265,7 +265,11 @@ struct vfp_double { * which returns (double)0.0. This is useful for the compare with * zero instructions. */ +#ifdef CONFIG_VFPv3 +#define VFP_REG_ZERO 32 +#else #define VFP_REG_ZERO 16 +#endif extern u64 vfp_get_double(unsigned int reg); extern void vfp_put_double(u64 val, unsigned int reg); diff --git a/arch/arm/vfp/vfphw.S b/arch/arm/vfp/vfphw.S index 53d9f8e8fac3..353f9e5c7919 100644 --- a/arch/arm/vfp/vfphw.S +++ b/arch/arm/vfp/vfphw.S @@ -99,12 +99,12 @@ vfp_support_entry: DBGSTR1 "save old state %p", r4 cmp r4, #0 beq no_old_VFP_process + VFPFSTMIA r4, r5 @ save the working registers VFPFMRX r5, FPSCR @ current status tst r1, #FPEXC_EX @ is there additional state to save? VFPFMRX r6, FPINST, NE @ FPINST (only if FPEXC.EX is set) tstne r1, #FPEXC_FP2V @ is there an FPINST2 to read? VFPFMRX r8, FPINST2, NE @ FPINST2 if needed (and present) - VFPFSTMIA r4 @ save the working registers stmia r4, {r1, r5, r6, r8} @ save FPEXC, FPSCR, FPINST, FPINST2 @ and point r4 at the word at the @ start of the register dump @@ -114,7 +114,7 @@ no_old_VFP_process: DBGSTR1 "load state %p", r10 str r10, [r3, r11, lsl #2] @ update the last_VFP_context pointer @ Load the saved state back into the VFP - VFPFLDMIA r10 @ reload the working registers while + VFPFLDMIA r10, r5 @ reload the working registers while @ FPEXC is in a safe state ldmia r10, {r1, r5, r6, r8} @ load FPEXC, FPSCR, FPINST, FPINST2 tst r1, #FPEXC_EX @ is there additional state to restore? @@ -174,12 +174,12 @@ vfp_save_state: @ r0 - save location @ r1 - FPEXC DBGSTR1 "save VFP state %p", r0 + VFPFSTMIA r0, r2 @ save the working registers VFPFMRX r2, FPSCR @ current status tst r1, #FPEXC_EX @ is there additional state to save? VFPFMRX r3, FPINST, NE @ FPINST (only if FPEXC.EX is set) tstne r1, #FPEXC_FP2V @ is there an FPINST2 to read? VFPFMRX r12, FPINST2, NE @ FPINST2 if needed (and present) - VFPFSTMIA r0 @ save the working registers stmia r0, {r1, r2, r3, r12} @ save FPEXC, FPSCR, FPINST, FPINST2 mov pc, lr #endif @@ -217,8 +217,15 @@ vfp_get_double: fmrrd r0, r1, d\dr mov pc, lr .endr +#ifdef CONFIG_VFPv3 + @ d16 - d31 registers + .irp dr,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15 + mrrc p11, 3, r0, r1, c\dr @ fmrrd r0, r1, d\dr + mov pc, lr + .endr +#endif - @ virtual register 16 for compare with zero + @ virtual register 16 (or 32 if VFPv3) for compare with zero mov r0, #0 mov r1, #0 mov pc, lr @@ -231,3 +238,10 @@ vfp_put_double: fmdrr d\dr, r0, r1 mov pc, lr .endr +#ifdef CONFIG_VFPv3 + @ d16 - d31 registers + .irp dr,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15 + mcrr p11, 3, r1, r2, c\dr @ fmdrr r1, r2, d\dr + mov pc, lr + .endr +#endif diff --git a/arch/arm/vfp/vfpinstr.h b/arch/arm/vfp/vfpinstr.h index 7f343a4beca0..15b95b5ab97e 100644 --- a/arch/arm/vfp/vfpinstr.h +++ b/arch/arm/vfp/vfpinstr.h @@ -52,11 +52,11 @@ #define FEXT_TO_IDX(inst) ((inst & 0x000f0000) >> 15 | (inst & (1 << 7)) >> 7) #define vfp_get_sd(inst) ((inst & 0x0000f000) >> 11 | (inst & (1 << 22)) >> 22) -#define vfp_get_dd(inst) ((inst & 0x0000f000) >> 12) +#define vfp_get_dd(inst) ((inst & 0x0000f000) >> 12 | (inst & (1 << 22)) >> 18) #define vfp_get_sm(inst) ((inst & 0x0000000f) << 1 | (inst & (1 << 5)) >> 5) -#define vfp_get_dm(inst) ((inst & 0x0000000f)) +#define vfp_get_dm(inst) ((inst & 0x0000000f) | (inst & (1 << 5)) >> 1) #define vfp_get_sn(inst) ((inst & 0x000f0000) >> 15 | (inst & (1 << 7)) >> 7) -#define vfp_get_dn(inst) ((inst & 0x000f0000) >> 16) +#define vfp_get_dn(inst) ((inst & 0x000f0000) >> 16 | (inst & (1 << 7)) >> 3) #define vfp_single(inst) (((inst) & 0x0000f00) == 0xa00) |