haraldwolff/qemu-patch-raspberry4
1
0
Fork 0
Code Issues Pull requests Packages Projects Releases Wiki Activity

target/arm: Add cfgend parameter for ARM CPU selection.

Browse source 
Add a new "cfgend" property which selects whether the CPU resets into
big-endian mode or not.  This setting affects whether we reset with
SCTLR_B (ARMv6 and earlier) or SCTLR_EE (ARMv7 and later) set.

Signed-off-by: Julian Brown <julian@codesourcery.com>
Message-id: 11420d1c49636c1790e60578ee996e51f0f0b835.1484929304.git.julian@codesourcery.com
[PMM: use error_report_err() rather than error_report();
 move the integratorcp changes to their own patch;
 drop an unnecessary extra #include;
 rephrase commit message accordingly;
 move setting of reset_sctlr above registration of cpregs
 so it actually has an effect]
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Julian Brown 2017-02-07 18:29:59 +00:00 committed by Peter Maydell
parent 00909b5858
commit 3a062d5730
2 changed files with 20 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

13
target/arm/cpu.c
View file

@ -541,6 +541,9 @@ static Property arm_cpu_has_el2_property =
static Property arm_cpu_has_el3_property =
DEFINE_PROP_BOOL("has_el3", ARMCPU, has_el3, true);
static Property arm_cpu_cfgend_property =
DEFINE_PROP_BOOL("cfgend", ARMCPU, cfgend, false);
/* use property name "pmu" to match other archs and virt tools */
static Property arm_cpu_has_pmu_property =
DEFINE_PROP_BOOL("pmu", ARMCPU, has_pmu, true);
@ -608,6 +611,8 @@ static void arm_cpu_post_init(Object *obj)
}
}
qdev_property_add_static(DEVICE(obj), &arm_cpu_cfgend_property,
&error_abort);
}
static void arm_cpu_finalizefn(Object *obj)
@ -728,6 +733,14 @@ static void arm_cpu_realizefn(DeviceState *dev, Error **errp)
cpu->reset_sctlr |= (1 << 13);
}
if (cpu->cfgend) {
if (arm_feature(&cpu->env, ARM_FEATURE_V7)) {
cpu->reset_sctlr |= SCTLR_EE;
} else {
cpu->reset_sctlr |= SCTLR_B;
}
}
if (!cpu->has_el3) {
/* If the has_el3 CPU property is disabled then we need to disable the
* feature.

7
target/arm/cpu.h
View file

@ -676,6 +676,13 @@ struct ARMCPU {
int gic_vpribits; /* number of virtual priority bits */
int gic_vprebits; /* number of virtual preemption bits */
/* Whether the cfgend input is high (i.e. this CPU should reset into
* big-endian mode). This setting isn't used directly: instead it modifies
* the reset_sctlr value to have SCTLR_B or SCTLR_EE set, depending on the
* architecture version.
*/
bool cfgend;
ARMELChangeHook *el_change_hook;
void *el_change_hook_opaque;
};