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qemu-e2k/hw/misc/grlib_ahb_apb_pnp.c
KONRAD Frederic 162abf1a83 leon3: introduce the plug and play mechanism 
This adds the AHB and APB plug and play devices.
They are scanned during the linux boot to discover the various peripheral.

Reviewed-by: Fabien Chouteau <chouteau@adacore.com>
Signed-off-by: KONRAD Frederic <frederic.konrad@adacore.com>
Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
2019-05-17 09:17:11 +01:00

270 lines
9.5 KiB
C
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/*
* GRLIB AHB APB PNP
*
* Copyright (C) 2019 AdaCore
*
* Developed by :
* Frederic Konrad <frederic.konrad@adacore.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, see <http://www.gnu.org/licenses/>.
*
*/
#include "qemu/osdep.h"
#include "hw/sysbus.h"
#include "hw/misc/grlib_ahb_apb_pnp.h"
#define GRLIB_PNP_VENDOR_SHIFT (24)
#define GRLIB_PNP_VENDOR_SIZE (8)
#define GRLIB_PNP_DEV_SHIFT (12)
#define GRLIB_PNP_DEV_SIZE (12)
#define GRLIB_PNP_VER_SHIFT (5)
#define GRLIB_PNP_VER_SIZE (5)
#define GRLIB_PNP_IRQ_SHIFT (0)
#define GRLIB_PNP_IRQ_SIZE (5)
#define GRLIB_PNP_ADDR_SHIFT (20)
#define GRLIB_PNP_ADDR_SIZE (12)
#define GRLIB_PNP_MASK_SHIFT (4)
#define GRLIB_PNP_MASK_SIZE (12)
#define GRLIB_AHB_DEV_ADDR_SHIFT (20)
#define GRLIB_AHB_DEV_ADDR_SIZE (12)
#define GRLIB_AHB_ENTRY_SIZE (0x20)
#define GRLIB_AHB_MAX_DEV (64)
#define GRLIB_AHB_SLAVE_OFFSET (0x800)
#define GRLIB_APB_DEV_ADDR_SHIFT (8)
#define GRLIB_APB_DEV_ADDR_SIZE (12)
#define GRLIB_APB_ENTRY_SIZE (0x08)
#define GRLIB_APB_MAX_DEV (512)
#define GRLIB_PNP_MAX_REGS (0x1000)
typedef struct AHBPnp {
SysBusDevice parent_obj;
MemoryRegion iomem;
uint32_t regs[GRLIB_PNP_MAX_REGS >> 2];
uint8_t master_count;
uint8_t slave_count;
} AHBPnp;
void grlib_ahb_pnp_add_entry(AHBPnp *dev, uint32_t address, uint32_t mask,
uint8_t vendor, uint16_t device, int slave,
int type)
{
unsigned int reg_start;
/*
* AHB entries look like this:
*
* 31 -------- 23 -------- 11 ----- 9 -------- 4 --- 0
* | VENDOR ID | DEVICE ID | IRQ ? | VERSION | IRQ |
* --------------------------------------------------
* | USER |
* --------------------------------------------------
* | USER |
* --------------------------------------------------
* | USER |
* --------------------------------------------------
* | USER |
* --------------------------------------------------
* 31 ----------- 20 --- 15 ----------------- 3 ---- 0
* | ADDR[31..12] | 00PC | MASK | TYPE |
* --------------------------------------------------
* 31 ----------- 20 --- 15 ----------------- 3 ---- 0
* | ADDR[31..12] | 00PC | MASK | TYPE |
* --------------------------------------------------
* 31 ----------- 20 --- 15 ----------------- 3 ---- 0
* | ADDR[31..12] | 00PC | MASK | TYPE |
* --------------------------------------------------
* 31 ----------- 20 --- 15 ----------------- 3 ---- 0
* | ADDR[31..12] | 00PC | MASK | TYPE |
* --------------------------------------------------
*/
if (slave) {
assert(dev->slave_count < GRLIB_AHB_MAX_DEV);
reg_start = (GRLIB_AHB_SLAVE_OFFSET
+ (dev->slave_count * GRLIB_AHB_ENTRY_SIZE)) >> 2;
dev->slave_count++;
} else {
assert(dev->master_count < GRLIB_AHB_MAX_DEV);
reg_start = (dev->master_count * GRLIB_AHB_ENTRY_SIZE) >> 2;
dev->master_count++;
}
dev->regs[reg_start] = deposit32(dev->regs[reg_start],
GRLIB_PNP_VENDOR_SHIFT,
GRLIB_PNP_VENDOR_SIZE,
vendor);
dev->regs[reg_start] = deposit32(dev->regs[reg_start],
GRLIB_PNP_DEV_SHIFT,
GRLIB_PNP_DEV_SIZE,
device);
reg_start += 4;
/* AHB Memory Space */
dev->regs[reg_start] = type;
dev->regs[reg_start] = deposit32(dev->regs[reg_start],
GRLIB_PNP_ADDR_SHIFT,
GRLIB_PNP_ADDR_SIZE,
extract32(address,
GRLIB_AHB_DEV_ADDR_SHIFT,
GRLIB_AHB_DEV_ADDR_SIZE));
dev->regs[reg_start] = deposit32(dev->regs[reg_start],
GRLIB_PNP_MASK_SHIFT,
GRLIB_PNP_MASK_SIZE,
mask);
}
static uint64_t grlib_ahb_pnp_read(void *opaque, hwaddr offset, unsigned size)
{
AHBPnp *ahb_pnp = GRLIB_AHB_PNP(opaque);
return ahb_pnp->regs[offset >> 2];
}
static const MemoryRegionOps grlib_ahb_pnp_ops = {
.read = grlib_ahb_pnp_read,
.endianness = DEVICE_BIG_ENDIAN,
};
static void grlib_ahb_pnp_realize(DeviceState *dev, Error **errp)
{
AHBPnp *ahb_pnp = GRLIB_AHB_PNP(dev);
SysBusDevice *sbd = SYS_BUS_DEVICE(dev);
memory_region_init_io(&ahb_pnp->iomem, OBJECT(dev), &grlib_ahb_pnp_ops,
ahb_pnp, TYPE_GRLIB_AHB_PNP, GRLIB_PNP_MAX_REGS);
sysbus_init_mmio(sbd, &ahb_pnp->iomem);
}
static void grlib_ahb_pnp_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
dc->realize = grlib_ahb_pnp_realize;
}
static const TypeInfo grlib_ahb_pnp_info = {
.name = TYPE_GRLIB_AHB_PNP,
.parent = TYPE_SYS_BUS_DEVICE,
.instance_size = sizeof(AHBPnp),
.class_init = grlib_ahb_pnp_class_init,
};
/* APBPnp */
typedef struct APBPnp {
SysBusDevice parent_obj;
MemoryRegion iomem;
uint32_t regs[GRLIB_PNP_MAX_REGS >> 2];
uint32_t entry_count;
} APBPnp;
void grlib_apb_pnp_add_entry(APBPnp *dev, uint32_t address, uint32_t mask,
uint8_t vendor, uint16_t device, uint8_t version,
uint8_t irq, int type)
{
unsigned int reg_start;
/*
* APB entries look like this:
*
* 31 -------- 23 -------- 11 ----- 9 ------- 4 --- 0
* | VENDOR ID | DEVICE ID | IRQ ? | VERSION | IRQ |
*
* 31 ---------- 20 --- 15 ----------------- 3 ---- 0
* | ADDR[20..8] | 0000 | MASK | TYPE |
*/
assert(dev->entry_count < GRLIB_APB_MAX_DEV);
reg_start = (dev->entry_count * GRLIB_APB_ENTRY_SIZE) >> 2;
dev->entry_count++;
dev->regs[reg_start] = deposit32(dev->regs[reg_start],
GRLIB_PNP_VENDOR_SHIFT,
GRLIB_PNP_VENDOR_SIZE,
vendor);
dev->regs[reg_start] = deposit32(dev->regs[reg_start],
GRLIB_PNP_DEV_SHIFT,
GRLIB_PNP_DEV_SIZE,
device);
dev->regs[reg_start] = deposit32(dev->regs[reg_start],
GRLIB_PNP_VER_SHIFT,
GRLIB_PNP_VER_SIZE,
version);
dev->regs[reg_start] = deposit32(dev->regs[reg_start],
GRLIB_PNP_IRQ_SHIFT,
GRLIB_PNP_IRQ_SIZE,
irq);
reg_start += 1;
dev->regs[reg_start] = type;
dev->regs[reg_start] = deposit32(dev->regs[reg_start],
GRLIB_PNP_ADDR_SHIFT,
GRLIB_PNP_ADDR_SIZE,
extract32(address,
GRLIB_APB_DEV_ADDR_SHIFT,
GRLIB_APB_DEV_ADDR_SIZE));
dev->regs[reg_start] = deposit32(dev->regs[reg_start],
GRLIB_PNP_MASK_SHIFT,
GRLIB_PNP_MASK_SIZE,
mask);
}
static uint64_t grlib_apb_pnp_read(void *opaque, hwaddr offset, unsigned size)
{
APBPnp *apb_pnp = GRLIB_APB_PNP(opaque);
return apb_pnp->regs[offset >> 2];
}
static const MemoryRegionOps grlib_apb_pnp_ops = {
.read = grlib_apb_pnp_read,
.endianness = DEVICE_BIG_ENDIAN,
};
static void grlib_apb_pnp_realize(DeviceState *dev, Error **errp)
{
APBPnp *apb_pnp = GRLIB_APB_PNP(dev);
SysBusDevice *sbd = SYS_BUS_DEVICE(dev);
memory_region_init_io(&apb_pnp->iomem, OBJECT(dev), &grlib_apb_pnp_ops,
apb_pnp, TYPE_GRLIB_APB_PNP, GRLIB_PNP_MAX_REGS);
sysbus_init_mmio(sbd, &apb_pnp->iomem);
}
static void grlib_apb_pnp_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
dc->realize = grlib_apb_pnp_realize;
}
static const TypeInfo grlib_apb_pnp_info = {
.name = TYPE_GRLIB_APB_PNP,
.parent = TYPE_SYS_BUS_DEVICE,
.instance_size = sizeof(APBPnp),
.class_init = grlib_apb_pnp_class_init,
};
static void grlib_ahb_apb_pnp_register_types(void)
{
type_register_static(&grlib_ahb_pnp_info);
type_register_static(&grlib_apb_pnp_info);
}
type_init(grlib_ahb_apb_pnp_register_types)
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