diff options
| author | dfr <dfr@FreeBSD.org> | 2001-09-24 17:07:23 +0000 |
|---|---|---|
| committer | dfr <dfr@FreeBSD.org> | 2001-09-24 17:07:23 +0000 |
| commit | f08f7cc358adca3dc4d8e633adec09cf038363b8 (patch) | |
| tree | cc6081b89940e846684058221bac7df6361705c5 /sys | |
| parent | a6b2db14f696e8960f27acd3ff55e62f8d79a85a (diff) | |
| download | FreeBSD-src-f08f7cc358adca3dc4d8e633adec09cf038363b8.zip FreeBSD-src-f08f7cc358adca3dc4d8e633adec09cf038363b8.tar.gz | |
Add some code which can be used to change to/from physical mode when
calling various firmware functions.
Diffstat (limited to 'sys')
| -rw-r--r-- | sys/ia64/ia64/support.S | 67 | ||||
| -rw-r--r-- | sys/ia64/ia64/support.s | 67 |
2 files changed, 134 insertions, 0 deletions
diff --git a/sys/ia64/ia64/support.S b/sys/ia64/ia64/support.S index d6c71d5..ad537e8 100644 --- a/sys/ia64/ia64/support.S +++ b/sys/ia64/ia64/support.S @@ -53,10 +53,77 @@ */ #include <machine/asm.h> +#include <machine/ia64_cpu.h> #include <assym.s> .text +/* + * ia64_change_mode: change mode to/from physical mode + * + * Arguments: + * r14 psr for desired mode + */ +ENTRY(ia64_change_mode, 0) + + rsm psr.i | psr.ic + mov ar.rsc=0 // turn off RSE + tbit.nz p6,p7=r14,17 // physical or virtual ? + ;; +(p6) mov r15=7 // RR base for virtual addresses +(p7) mov r15=0 // RR base for physical addresses + flushrs // no dirty registers please + srlz.i + ;; + mov r16=ar.bsp + mov r17=rp + mov r18=ar.rnat + ;; + dep r16=r15,r16,61,3 // new address of ar.bsp + dep r17=r15,r17,61,3 // new address of rp + ;; + mov ar.bspstore=r16 + mov rp=r17 + ;; +1: mov r16=ip + mov ar.rnat=r18 + mov cr.ipsr=r14 // psr for physical mode + ;; + add r16=2f-1b,r16 // address to rfi to + ;; + dep r16=r15,r16,61,3 // physical + ;; + mov cr.iip=r16 // setup for rfi + mov cr.ifs=r0 + ;; + rfi + +2: br.ret.sptk.few rp // now in physical mode + +END(ia64_change_mode) + +/* + * ia64_physical_mode: change mode to physical mode + * + * Return: + * ret0 psr to restore + */ +ENTRY(ia64_physical_mode, 0) + + mov r14=psr + mov ret0=psr + movl r15=(IA64_PSR_I|IA64_PSR_IT|IA64_PSR_DT|IA64_PSR_RT) + movl r16=IA64_PSR_BN + ;; + andcm r14=r14,r15 // clear various xT bits + ;; + or r14=r14,r16 // make sure BN=1 + or ret0=ret0,r16 // make sure BN=1 + + br.cond.sptk.many ia64_change_mode + +END(ia64_physical_mode) + /**************************************************************************/ /* diff --git a/sys/ia64/ia64/support.s b/sys/ia64/ia64/support.s index d6c71d5..ad537e8 100644 --- a/sys/ia64/ia64/support.s +++ b/sys/ia64/ia64/support.s @@ -53,10 +53,77 @@ */ #include <machine/asm.h> +#include <machine/ia64_cpu.h> #include <assym.s> .text +/* + * ia64_change_mode: change mode to/from physical mode + * + * Arguments: + * r14 psr for desired mode + */ +ENTRY(ia64_change_mode, 0) + + rsm psr.i | psr.ic + mov ar.rsc=0 // turn off RSE + tbit.nz p6,p7=r14,17 // physical or virtual ? + ;; +(p6) mov r15=7 // RR base for virtual addresses +(p7) mov r15=0 // RR base for physical addresses + flushrs // no dirty registers please + srlz.i + ;; + mov r16=ar.bsp + mov r17=rp + mov r18=ar.rnat + ;; + dep r16=r15,r16,61,3 // new address of ar.bsp + dep r17=r15,r17,61,3 // new address of rp + ;; + mov ar.bspstore=r16 + mov rp=r17 + ;; +1: mov r16=ip + mov ar.rnat=r18 + mov cr.ipsr=r14 // psr for physical mode + ;; + add r16=2f-1b,r16 // address to rfi to + ;; + dep r16=r15,r16,61,3 // physical + ;; + mov cr.iip=r16 // setup for rfi + mov cr.ifs=r0 + ;; + rfi + +2: br.ret.sptk.few rp // now in physical mode + +END(ia64_change_mode) + +/* + * ia64_physical_mode: change mode to physical mode + * + * Return: + * ret0 psr to restore + */ +ENTRY(ia64_physical_mode, 0) + + mov r14=psr + mov ret0=psr + movl r15=(IA64_PSR_I|IA64_PSR_IT|IA64_PSR_DT|IA64_PSR_RT) + movl r16=IA64_PSR_BN + ;; + andcm r14=r14,r15 // clear various xT bits + ;; + or r14=r14,r16 // make sure BN=1 + or ret0=ret0,r16 // make sure BN=1 + + br.cond.sptk.many ia64_change_mode + +END(ia64_physical_mode) + /**************************************************************************/ /* |
