u-boot/arch/mips/cpu/cm_init.S
Tom Rini 83d290c56f SPDX: Convert all of our single license tags to Linux Kernel style
When U-Boot started using SPDX tags we were among the early adopters and
there weren't a lot of other examples to borrow from.  So we picked the
area of the file that usually had a full license text and replaced it
with an appropriate SPDX-License-Identifier: entry.  Since then, the
Linux Kernel has adopted SPDX tags and they place it as the very first
line in a file (except where shebangs are used, then it's second line)
and with slightly different comment styles than us.

In part due to community overlap, in part due to better tag visibility
and in part for other minor reasons, switch over to that style.

This commit changes all instances where we have a single declared
license in the tag as both the before and after are identical in tag
contents.  There's also a few places where I found we did not have a tag
and have introduced one.

Signed-off-by: Tom Rini <trini@konsulko.com>
2018-05-07 09:34:12 -04:00

44 lines
946 B
ArmAsm

/* SPDX-License-Identifier: GPL-2.0+ */
/*
* MIPS Coherence Manager (CM) Initialisation
*
* Copyright (c) 2016 Imagination Technologies Ltd.
*/
#include <asm/addrspace.h>
#include <asm/asm.h>
#include <asm/cm.h>
#include <asm/mipsregs.h>
#include <asm/regdef.h>
LEAF(mips_cm_map)
/* Config3 must exist for a CM to be present */
mfc0 t0, CP0_CONFIG, 1
bgez t0, 2f
mfc0 t0, CP0_CONFIG, 2
bgez t0, 2f
/* Check Config3.CMGCR to determine CM presence */
mfc0 t0, CP0_CONFIG, 3
and t0, t0, MIPS_CONF3_CMGCR
beqz t0, 2f
/* Find the current physical GCR base address */
1: MFC0 t0, CP0_CMGCRBASE
PTR_SLL t0, t0, 4
/* If the GCRs are where we want, we're done */
PTR_LI t1, CONFIG_MIPS_CM_BASE
beq t0, t1, 2f
/* Move the GCRs to our configured base address */
PTR_LI t2, CKSEG1
PTR_ADDU t0, t0, t2
sw zero, GCR_BASE_UPPER(t0)
sw t1, GCR_BASE(t0)
/* Re-check the GCR base */
b 1b
2: jr ra
END(mips_cm_map)