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hw/misc/iotkit-secctl.c: Implement SECMPCINTSTATUS

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Implement the SECMPCINTSTATUS register. This is the only register
in the security controller that deals with Memory Protection
Controllers, and it simply provides a read-only view of the
interrupt lines from the various MPCs in the system.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 20180620132032.28865-6-peter.maydell@linaro.org
This commit is contained in:
Peter Maydell 2018-06-22 13:28:40 +01:00
parent dd29d0687d
commit 3fd3cb2f6f
2 changed files with 44 additions and 2 deletions
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38
hw/misc/iotkit-secctl.c
View File

@ -139,6 +139,9 @@ static MemTxResult iotkit_secctl_s_read(void *opaque, hwaddr addr,
case A_NSCCFG:
r = s->nsccfg;
break;
case A_SECMPCINTSTATUS:
r = s->mpcintstatus;
break;
case A_SECPPCINTSTAT:
r = s->secppcintstat;
break;
@ -186,7 +189,6 @@ static MemTxResult iotkit_secctl_s_read(void *opaque, hwaddr addr,
case A_APBSPPPCEXP3:
r = s->apbexp[offset_to_ppc_idx(offset)].sp;
break;
case A_SECMPCINTSTATUS:
case A_SECMSCINTSTAT:
case A_SECMSCINTEN:
case A_NSMSCEXP:
@ -572,6 +574,20 @@ static void iotkit_secctl_reset(DeviceState *dev)
foreach_ppc(s, iotkit_secctl_reset_ppc);
}
static void iotkit_secctl_mpc_status(void *opaque, int n, int level)
{
IoTKitSecCtl *s = IOTKIT_SECCTL(opaque);
s->mpcintstatus = deposit32(s->mpcintstatus, 0, 1, !!level);
}
static void iotkit_secctl_mpcexp_status(void *opaque, int n, int level)
{
IoTKitSecCtl *s = IOTKIT_SECCTL(opaque);
s->mpcintstatus = deposit32(s->mpcintstatus, n + 16, 1, !!level);
}
static void iotkit_secctl_ppc_irqstatus(void *opaque, int n, int level)
{
IoTKitSecCtlPPC *ppc = opaque;
@ -640,6 +656,10 @@ static void iotkit_secctl_init(Object *obj)
qdev_init_gpio_out_named(dev, &s->sec_resp_cfg, "sec_resp_cfg", 1);
qdev_init_gpio_out_named(dev, &s->nsc_cfg_irq, "nsc_cfg", 1);
qdev_init_gpio_in_named(dev, iotkit_secctl_mpc_status, "mpc_status", 1);
qdev_init_gpio_in_named(dev, iotkit_secctl_mpcexp_status,
"mpcexp_status", IOTS_NUM_EXP_MPC);
memory_region_init_io(&s->s_regs, obj, &iotkit_secctl_s_ops,
s, "iotkit-secctl-s-regs", 0x1000);
memory_region_init_io(&s->ns_regs, obj, &iotkit_secctl_ns_ops,
@ -660,6 +680,16 @@ static const VMStateDescription iotkit_secctl_ppc_vmstate = {
}
};
static const VMStateDescription iotkit_secctl_mpcintstatus_vmstate = {
.name = "iotkit-secctl-mpcintstatus",
.version_id = 1,
.minimum_version_id = 1,
.fields = (VMStateField[]) {
VMSTATE_UINT32(mpcintstatus, IoTKitSecCtl),
VMSTATE_END_OF_LIST()
}
};
static const VMStateDescription iotkit_secctl_vmstate = {
.name = "iotkit-secctl",
.version_id = 1,
@ -677,7 +707,11 @@ static const VMStateDescription iotkit_secctl_vmstate = {
VMSTATE_STRUCT_ARRAY(ahbexp, IoTKitSecCtl, IOTS_NUM_AHB_EXP_PPC, 1,
iotkit_secctl_ppc_vmstate, IoTKitSecCtlPPC),
VMSTATE_END_OF_LIST()
}
},
.subsections = (const VMStateDescription*[]) {
&iotkit_secctl_mpcintstatus_vmstate,
NULL
},
};
static void iotkit_secctl_class_init(ObjectClass *klass, void *data)

8
include/hw/misc/iotkit-secctl.h
View File

@ -39,6 +39,11 @@
* + named GPIO outputs ahb_ppcexp{0,1,2,3}_irq_enable
* + named GPIO outputs ahb_ppcexp{0,1,2,3}_irq_clear
* + named GPIO inputs ahb_ppcexp{0,1,2,3}_irq_status
* Controlling the MPC in the IoTKit:
* + named GPIO input mpc_status
* Controlling each of the 16 expansion MPCs which a system using the IoTKit
* might provide:
* + named GPIO inputs mpcexp_status[0..15]
*/
#ifndef IOTKIT_SECCTL_H
@ -55,6 +60,8 @@
#define IOTS_NUM_APB_PPC 2
#define IOTS_NUM_APB_EXP_PPC 4
#define IOTS_NUM_AHB_EXP_PPC 4
#define IOTS_NUM_EXP_MPC 16
#define IOTS_NUM_MPC 1
typedef struct IoTKitSecCtl IoTKitSecCtl;
@ -94,6 +101,7 @@ struct IoTKitSecCtl {
uint32_t secrespcfg;
uint32_t nsccfg;
uint32_t brginten;
uint32_t mpcintstatus;
IoTKitSecCtlPPC apb[IOTS_NUM_APB_PPC];
IoTKitSecCtlPPC apbexp[IOTS_NUM_APB_EXP_PPC];