Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit b0302722 authored by Michael Neuling's avatar Michael Neuling Committed by Benjamin Herrenschmidt
Browse files

powerpc: Setup relocation on exceptions for bare metal systems 



This turns on MMU on execptions via AIL field in the LPCR.

Signed-off-by: default avatarMatt Evans <matt@ozlabs.org>
Signed-off-by: default avatarMichael Neuling <mikey@neuling.org>
Signed-off-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
parent f7c32c24

arch/powerpc/include/asm/reg.h

+2 −0
Original line number Diff line number Diff line
@@ -249,6 +249,8 @@ 
#define   LPCR_RMLS    0x1C000000      /* impl dependent rmo limit sel */

#define	  LPCR_RMLS_SH	(63-37)

#define   LPCR_ILE     0x02000000      /* !HV irqs set MSR:LE */

#define   LPCR_AIL_0	0x00000000	/* MMU off exception offset 0x0 */

#define   LPCR_AIL_3	0x01800000	/* MMU on exception offset 0xc00...4xxx */

#define   LPCR_PECE	0x00007000	/* powersave exit cause enable */

#define     LPCR_PECE0	0x00004000	/* ext. exceptions can cause exit */

#define     LPCR_PECE1	0x00002000	/* decrementer can cause exit */

arch/powerpc/kernel/cpu_setup_power.S

+2 −0
Original line number Diff line number Diff line
@@ -54,6 +54,7 @@ _GLOBAL(__setup_cpu_power8) 
	li	r0,0

	mtspr	SPRN_LPID,r0

	mfspr	r3,SPRN_LPCR

	oris	r3, r3, LPCR_AIL_3@h

	bl	__init_LPCR

	bl	__init_TLB

	mtlr	r11
@@ -67,6 +68,7 @@ _GLOBAL(__restore_cpu_power8) 
	li	r0,0

	mtspr	SPRN_LPID,r0

	mfspr   r3,SPRN_LPCR

	oris	r3, r3, LPCR_AIL_3@h

	bl	__init_LPCR

	bl	__init_TLB

	mtlr	r11