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ppc: Convert PPC UIC to a QOM device

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Currently the PPC UIC ("Universal Interrupt Controller") is implemented
as a non-QOM device in ppc4xx_devs.c. Convert it to a proper QOM device
in hw/intc.

The ppcuic_init() function is retained for the moment with its current
interface; in subsequent commits this will be tidied up to avoid the
allocation of an irq array.

This conversion adds VMState support.

It leaves the LOG_UIC() macro as-is to maximise the extent to which
this is simply code-movement rather than a rewrite (in new code it
would be better to use tracepoints).

The default property values for dcr-base and use-vectors are set to
match those use by most of our boards with a UIC.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Message-Id: <20201212001537.24520-3-peter.maydell@linaro.org>
Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
Tested-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This commit is contained in:
Peter Maydell 2020-12-12 00:15:31 +00:00 • committed by David Gibson
parent 59a958bb74
commit 34d0831f38
7 changed files with 431 additions and 237 deletions
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73
include/hw/intc/ppc-uic.h Normal file
View file

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/*
* "Universal" Interrupt Controller for PowerPPC 4xx embedded processors
*
* Copyright (c) 2007 Jocelyn Mayer
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#ifndef HW_INTC_PPC_UIC_H
#define HW_INTC_PPC_UIC_H
#include "hw/sysbus.h"
#include "qom/object.h"
#define TYPE_PPC_UIC "ppc-uic"
OBJECT_DECLARE_SIMPLE_TYPE(PPCUIC, PPC_UIC)
/*
* QEMU interface:
* QOM property "cpu": link to the PPC CPU
* (no default, must be set)
* QOM property "dcr-base": base of the bank of DCR registers for the UIC
* (default 0x30)
* QOM property "use-vectors": true if the UIC has vector registers
* (default true)
* unnamed GPIO inputs 0..UIC_MAX_IRQ: input IRQ lines
* sysbus IRQs:
* 0 (PPCUIC_OUTPUT_INT): output INT line to the CPU
* 1 (PPCUIC_OUTPUT_CINT): output CINT line to the CPU
*/
#define UIC_MAX_IRQ 32
struct PPCUIC {
/*< private >*/
SysBusDevice parent_obj;
/*< public >*/
qemu_irq output_int;
qemu_irq output_cint;
/* properties */
CPUState *cpu;
uint32_t dcr_base;
bool use_vectors;
uint32_t level; /* Remembers the state of level-triggered interrupts. */
uint32_t uicsr; /* Status register */
uint32_t uicer; /* Enable register */
uint32_t uiccr; /* Critical register */
uint32_t uicpr; /* Polarity register */
uint32_t uictr; /* Triggering register */
uint32_t uicvcr; /* Vector configuration register */
uint32_t uicvr;
};
#endif