motorhead/qemu
1
0
Fork 0
mirror of https://github.com/Motorhead1991/qemu.git synced 2025-08-04 08:13:54 -06:00
Code Issues Projects Releases Packages Wiki Activity Actions

arm: add MPU support to M profile CPUs

Browse source 
The M series MPU is almost the same as the already implemented R
profile MPU (v7 PMSA).  So all we need to implement here is the MPU
register interface in the system register space.

This implementation has the same restriction as the R profile MPU
that it doesn't permit regions to be sized down smaller than 1K.

We also do not yet implement support for MPU_CTRL.HFNMIENA; this
bit should if zero disable use of the MPU when running HardFault,
NMI or with FAULTMASK set to 1 (ie at an execution priority of
less than zero) -- if the MPU is enabled we don't treat these
cases any differently.

Signed-off-by: Michael Davidsaver <mdavidsaver@gmail.com>
Message-id: 1493122030-32191-13-git-send-email-peter.maydell@linaro.org
[PMM: Keep all the bits in mpu_ctrl field, rather than
 using SCTLR bits for them; drop broken HFNMIENA support;
 various cleanup]
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Michael Davidsaver 2017-06-02 11:51:48 +01:00 • committed by Peter Maydell
parent 5dd0641d23
commit 29c483a506
4 changed files with 137 additions and 3 deletions
Download patch file Download diff file Expand all files Collapse all files

5
target/arm/machine.c
View file

@ -99,8 +99,8 @@ static bool m_needed(void *opaque)
static const VMStateDescription vmstate_m = {
.name = "cpu/m",
.version_id = 3,
.minimum_version_id = 3,
.version_id = 4,
.minimum_version_id = 4,
.needed = m_needed,
.fields = (VMStateField[]) {
VMSTATE_UINT32(env.v7m.vecbase, ARMCPU),
@ -112,6 +112,7 @@ static const VMStateDescription vmstate_m = {
VMSTATE_UINT32(env.v7m.dfsr, ARMCPU),
VMSTATE_UINT32(env.v7m.mmfar, ARMCPU),
VMSTATE_UINT32(env.v7m.bfar, ARMCPU),
VMSTATE_UINT32(env.v7m.mpu_ctrl, ARMCPU),
VMSTATE_INT32(env.v7m.exception, ARMCPU),
VMSTATE_END_OF_LIST()
}