diff options
| author | Grissiom <[email protected]> | 2013-05-31 20:25:44 +0800 |
|---|---|---|
| committer | Grissiom <[email protected]> | 2013-05-31 20:58:08 +0800 |
| commit | 24fc6e6ebbb5769941845e4549382be6d6f76ced (patch) | |
| tree | 3242febd63cc487a0b65229999c1a5d5db8d9fa0 /bsp/rm48x50 | |
| parent | 8bbfd45ce3bd78d01e8c03bd5877825f1bb4d610 (diff) | |
rm48x50: VFP lazy stacking
You need to turn on RT_VFP_LAZY_STACKING in rtconfig.h. By default, RTT
will turn on VFP for all threads and stack all the VFP registers. When
doing lazy stacking, VFP will only be turned on for the thread who
issued VFP instructions.
Currently, if a thread turned on VFP, it cannot be turned off. RTT will
never know what time the thread doesn't need VFP any more. The thread
might could turn off the VFP for it self in proper time.
Diffstat (limited to 'bsp/rm48x50')
| -rw-r--r-- | bsp/rm48x50/HALCoGen/source/sys_core.asm | 5 | ||||
| -rw-r--r-- | bsp/rm48x50/HALCoGen/source/sys_intvecs.asm | 13 | ||||
| -rw-r--r-- | bsp/rm48x50/rtconfig.h | 1 |
3 files changed, 14 insertions, 5 deletions
diff --git a/bsp/rm48x50/HALCoGen/source/sys_core.asm b/bsp/rm48x50/HALCoGen/source/sys_core.asm index bfb4ad22a8..ae2a9ebd93 100644 --- a/bsp/rm48x50/HALCoGen/source/sys_core.asm +++ b/bsp/rm48x50/HALCoGen/source/sys_core.asm @@ -72,8 +72,8 @@ _coreInitRegisters_ orr r2, r2, #0xF00000 mcr p15, #0x00, r2, c1, c0, #0x02 - ; Enable FPV - fmrx R2, fpexc + .if (RT_VFP_LAZY_STACKING) = 0 + fmrx r2, fpexc orr r2, r2, #0x40000000 fmxr fpexc, r2 @@ -93,6 +93,7 @@ _coreInitRegisters_ fmdrr d13, r1, r1 fmdrr d14, r1, r1 fmdrr d15, r1, r1 + .endif bl next1 next1 bl next2 diff --git a/bsp/rm48x50/HALCoGen/source/sys_intvecs.asm b/bsp/rm48x50/HALCoGen/source/sys_intvecs.asm index 16cd338fa0..e97ba448ac 100644 --- a/bsp/rm48x50/HALCoGen/source/sys_intvecs.asm +++ b/bsp/rm48x50/HALCoGen/source/sys_intvecs.asm @@ -21,8 +21,7 @@ resetEntry b _c_int00 -undefEntry - b undefEntry + b turnon_VFP svcEntry b svcEntry prefetchEntry @@ -33,5 +32,13 @@ reservedEntry b IRQ_Handler ldr pc,[pc,#-0x1b0] - + .sect ".text" +turnon_VFP + ; Enable FPV + STMDB sp!, {r0} + fmrx r0, fpexc + orr r0, r0, #0x40000000 + fmxr fpexc, r0 + LDMIA sp!, {r0} + subs pc, lr, #4 ;------------------------------------------------------------------------------- diff --git a/bsp/rm48x50/rtconfig.h b/bsp/rm48x50/rtconfig.h index 0ae5168fba..86fc630c8c 100644 --- a/bsp/rm48x50/rtconfig.h +++ b/bsp/rm48x50/rtconfig.h @@ -211,6 +211,7 @@ // #define RTGUI_USING_MOUSE_CURSOR // </section> +#define RT_VFP_LAZY_STACKING // </RDTConfigurator> #endif |