On Wed, 2014-01-22 at 20:49 -0600, Wang Dongsheng-B40534 wrote:
The whole point of calling enable_kernel_fp() in C code before
suspending is to ensure that the FP state gets saved. If FP is used
after that point it is a bug. If you're worried about such bugs, then
clear
Subject: Re: [PATCH 2/3] powerpc/85xx: Provide two functions to
save/restore the
core registers
On Mon, 2014-01-20 at 00:03 -0600, Wang Dongsheng-B40534 wrote:
+ /*
+ * Need to save float-point registers if MSR[FP] = 1.
+ */
+ mfmsr r12
+ andi
The whole point of calling enable_kernel_fp() in C code before
suspending is to ensure that the FP state gets saved. If FP is used
after that point it is a bug. If you're worried about such bugs, then
clear MSR[FP] after calling enable_kernel_fp(), rather than adding
redundant
On Mon, 2014-01-20 at 00:03 -0600, Wang Dongsheng-B40534 wrote:
+ /*
+ * Need to save float-point registers if MSR[FP] = 1.
+ */
+ mfmsr r12
+ andi. r12, r12, MSR_FP
+ beq 1f
+ do_sr_fpr_regs(save)
C code should have
-Original Message-
From: Wood Scott-B07421
Sent: Tuesday, January 21, 2014 9:06 AM
To: Wang Dongsheng-B40534
Cc: b...@kernel.crashing.org; Zhao Chenhui-B35336; an...@enomsg.org; linuxppc-
d...@lists.ozlabs.org
Subject: Re: [PATCH 2/3] powerpc/85xx: Provide two functions to save
What is there that is specfic to a particular core type that can't be
handled
from C code?
In the context of the calling, maybe not in C environment.(Deep sleep
without
C environment when calling those interfaces)
Could you provide a concrete example?
:)
Deep sleep, the
...@lists.ozlabs.org
Subject: Re: [PATCH 2/3] powerpc/85xx: Provide two functions to
save/restore the
core registers
On Tue, 2014-01-14 at 15:59 +0800, Dongsheng Wang wrote:
From: Wang Dongsheng dongsheng.w...@freescale.com
Add fsl_cpu_state_save/fsl_cpu_state_restore functions, used for deep
On Tue, 2014-01-14 at 15:59 +0800, Dongsheng Wang wrote:
From: Wang Dongsheng dongsheng.w...@freescale.com
Add fsl_cpu_state_save/fsl_cpu_state_restore functions, used for deep
sleep and hibernation to save/restore core registers. We abstract out
save/restore code for use in various modules,
-Original Message-
From: Wood Scott-B07421
Sent: Wednesday, January 15, 2014 7:51 AM
To: Wang Dongsheng-B40534
Cc: b...@kernel.crashing.org; Zhao Chenhui-B35336; an...@enomsg.org; linuxppc-
d...@lists.ozlabs.org
Subject: Re: [PATCH 2/3] powerpc/85xx: Provide two functions to save
