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ARCv2: entry: rewrite to enable use of double load/stores LDD/STD

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- the motivation was to be remove blatent copy-paste due to hasty support
   of CONFIG_ARC_IRQ_NO_AUTOSAVE support

 - but with refactoring we could use LDD/STD to greatly optimize the code

Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
This commit is contained in:
Vineet Gupta
2019-05-15 15:36:46 -07:00
parent ab854bfcd3
commit a4880801a7
4 changed files with 191 additions and 183 deletions
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7
arch/arc/kernel/asm-offsets.c
View File

@@ -55,7 +55,14 @@ int main(void)
DEFINE(PT_r5, offsetof(struct pt_regs, r5));
DEFINE(PT_r6, offsetof(struct pt_regs, r6));
DEFINE(PT_r7, offsetof(struct pt_regs, r7));
DEFINE(PT_r8, offsetof(struct pt_regs, r8));
DEFINE(PT_r10, offsetof(struct pt_regs, r10));
DEFINE(PT_r26, offsetof(struct pt_regs, r26));
DEFINE(PT_ret, offsetof(struct pt_regs, ret));
DEFINE(PT_blink, offsetof(struct pt_regs, blink));
DEFINE(PT_lpe, offsetof(struct pt_regs, lp_end));
DEFINE(PT_lpc, offsetof(struct pt_regs, lp_count));
DEFINE(PT_user_r25, offsetof(struct pt_regs, user_r25));
DEFINE(SZ_CALLEE_REGS, sizeof(struct callee_regs));
DEFINE(SZ_PT_REGS, sizeof(struct pt_regs));

4
arch/arc/kernel/entry-arcv2.S
View File

@@ -67,7 +67,7 @@ reserved:
ENTRY(handle_interrupt)
INTERRUPT_PROLOGUE irq
INTERRUPT_PROLOGUE
# irq control APIs local_irq_save/restore/disable/enable fiddle with
# global interrupt enable bits in STATUS32 (.IE for 1 prio, .E[] for 2 prio)
@@ -223,7 +223,7 @@ debug_marker_l1:
bset.nz r11, r11, AUX_IRQ_ACT_BIT_U ; NZ means U
sr r11, [AUX_IRQ_ACT]
INTERRUPT_EPILOGUE irq
INTERRUPT_EPILOGUE
rtie
;####### Return from Exception / pure kernel mode #######