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arm: v7R: Add initial support

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The Cortex-R* processors are a mid-range CPUs for use in deeply-embedded,
real-time systems. It implements the ARMv7-R architecture, and includes
Thumb-2 technology for optimum code density and processing throughput.

Except for MPU(Memory Protection Unit) and few CP15 registers, most of the
features are compatible with v7 architecture. So,reuse the same armv7
folder and introduce a new config CPU_V7R in order to differentiate
from v7 based platforms.

Tested-by: Michal Simek <michal.simek@xilinx.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
This commit is contained in:
Michal Simek 2018-04-26 18:21:29 +05:30 • committed by Tom Rini
parent f4bcd767bd
commit 4bbd6b1d94
4 changed files with 12 additions and 1 deletions
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7
arch/arm/Kconfig
View file

@ -212,6 +212,11 @@ config CPU_V7M
select THUMB2_KERNEL
select SYS_CACHE_SHIFT_5
config CPU_V7R
bool
select HAS_THUMB2
select SYS_CACHE_SHIFT_6
config CPU_PXA
bool
select SYS_CACHE_SHIFT_5
@ -230,6 +235,7 @@ config SYS_CPU
default "arm1136" if CPU_ARM1136
default "arm1176" if CPU_ARM1176
default "armv7" if CPU_V7A
default "armv7" if CPU_V7R
default "armv7m" if CPU_V7M
default "pxa" if CPU_PXA
default "sa1100" if CPU_SA1100
@ -245,6 +251,7 @@ config SYS_ARM_ARCH
default 6 if CPU_ARM1176
default 7 if CPU_V7A
default 7 if CPU_V7M
default 7 if CPU_V7R
default 5 if CPU_PXA
default 4 if CPU_SA1100
default 8 if ARM64

2
arch/arm/Makefile
View file

@ -16,6 +16,7 @@ arch-$(CONFIG_CPU_ARM1136) =-march=armv5
arch-$(CONFIG_CPU_ARM1176) =-march=armv5t
arch-$(CONFIG_CPU_V7A) =$(call cc-option, -march=armv7-a, \
$(call cc-option, -march=armv7, -march=armv5))
arch-$(CONFIG_CPU_V7R) =-march=armv7-r
arch-$(CONFIG_ARM64) =-march=armv8-a
# On Tegra systems we must build SPL for the armv4 core on the device
@ -39,6 +40,7 @@ tune-$(CONFIG_CPU_PXA) =-mcpu=xscale
tune-$(CONFIG_CPU_ARM1136) =
tune-$(CONFIG_CPU_ARM1176) =
tune-$(CONFIG_CPU_V7A) =
tune-$(CONFIG_CPU_V7R) =
tune-$(CONFIG_ARM64) =
# Evaluate tune cc-option calls now

2
arch/arm/cpu/armv7/start.S
View file

@ -81,7 +81,9 @@ switch_to_hypervisor_ret:
/* the mask ROM code should have PLL and others stable */
#ifndef CONFIG_SKIP_LOWLEVEL_INIT
#ifdef CONFIG_CPU_V7A
bl cpu_init_cp15
#endif
#ifndef CONFIG_SKIP_LOWLEVEL_INIT_ONLY
bl cpu_init_crit
#endif

2
cmd/Kconfig
View file

@ -1103,7 +1103,7 @@ config BOOTP_PXE_CLIENTARCH
config BOOTP_VCI_STRING
string
depends on CMD_BOOTP
default "U-Boot.armv7" if CPU_V7A || CPU_V7M
default "U-Boot.armv7" if CPU_V7A || CPU_V7M || CPU_V7R
default "U-Boot.armv8" if ARM64
default "U-Boot.arm" if ARM
default "U-Boot"