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Commit 213fb2a8 authored by Catalin Marinas's avatar Catalin Marinas
Browse files

ARMv7: Enable the SWP instruction 



The SWP instruction has been deprecated starting with the ARMv6
architecture. On ARMv7 processors with the multiprocessor extensions
(like Cortex-A9), this instruction is disabled by default but it can be
enabled by setting bit 10 in the System Control register. Note that
setting this bit is safe even if the ARMv7 processor has the SWP
instruction enabled by default.

Signed-off-by: default avatarCatalin Marinas <catalin.marinas@arm.com>
parent d71e1352

arch/arm/mm/proc-v7.S

+4 −4
Original line number Diff line number Diff line
@@ -232,14 +232,14 @@ __v7_setup: 
ENDPROC(__v7_setup)



	/*   AT

	 *  TFR   EV X F   I D LR

	 * .EEE ..EE PUI. .T.T 4RVI ZFRS BLDP WCAM

	 *  TFR   EV X F   I D LR    S

	 * .EEE ..EE PUI. .T.T 4RVI ZWRS BLDP WCAM

	 * rxxx rrxx xxx0 0101 xxxx xxxx x111 xxxx < forced

	 *    1    0 110       0011 1.00 .111 1101 < we want

	 *    1    0 110       0011 1100 .111 1101 < we want

	 */

	.type	v7_crval, #object

v7_crval:

	crval	clear=0x0120c302, mmuset=0x10c0387d, ucset=0x00c0187c

	crval	clear=0x0120c302, mmuset=0x10c03c7d, ucset=0x00c01c7c



__v7_setup_stack:

	.space	4 * 11				@ 11 registers