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qemu/hw/sun4m_iommu.c
Alexander Graf 2507c12ab0 Add endianness as io mem parameter 
As stated before, devices can be little, big or native endian. The
target endianness is not of their concern, so we need to push things
down a level.

This patch adds a parameter to cpu_register_io_memory that allows a
device to choose its endianness. For now, all devices simply choose
native endian, because that's the same behavior as before.

Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2010-12-11 15:24:25 +00:00

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/*
* QEMU Sun4m iommu emulation
*
* Copyright (c) 2003-2005 Fabrice Bellard
*
* 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.
*/
#include "sun4m.h"
#include "sysbus.h"
#include "trace.h"
/*
* I/O MMU used by Sun4m systems
*
* Chipset docs:
* "Sun-4M System Architecture (revision 2.0) by Chuck Narad", 950-1373-01,
* http://mediacast.sun.com/users/Barton808/media/Sun4M_SystemArchitecture_edited2.pdf
*/
#define IOMMU_NREGS (4*4096/4)
#define IOMMU_CTRL (0x0000 >> 2)
#define IOMMU_CTRL_IMPL 0xf0000000 /* Implementation */
#define IOMMU_CTRL_VERS 0x0f000000 /* Version */
#define IOMMU_CTRL_RNGE 0x0000001c /* Mapping RANGE */
#define IOMMU_RNGE_16MB 0x00000000 /* 0xff000000 -> 0xffffffff */
#define IOMMU_RNGE_32MB 0x00000004 /* 0xfe000000 -> 0xffffffff */
#define IOMMU_RNGE_64MB 0x00000008 /* 0xfc000000 -> 0xffffffff */
#define IOMMU_RNGE_128MB 0x0000000c /* 0xf8000000 -> 0xffffffff */
#define IOMMU_RNGE_256MB 0x00000010 /* 0xf0000000 -> 0xffffffff */
#define IOMMU_RNGE_512MB 0x00000014 /* 0xe0000000 -> 0xffffffff */
#define IOMMU_RNGE_1GB 0x00000018 /* 0xc0000000 -> 0xffffffff */
#define IOMMU_RNGE_2GB 0x0000001c /* 0x80000000 -> 0xffffffff */
#define IOMMU_CTRL_ENAB 0x00000001 /* IOMMU Enable */
#define IOMMU_CTRL_MASK 0x0000001d
#define IOMMU_BASE (0x0004 >> 2)
#define IOMMU_BASE_MASK 0x07fffc00
#define IOMMU_TLBFLUSH (0x0014 >> 2)
#define IOMMU_TLBFLUSH_MASK 0xffffffff
#define IOMMU_PGFLUSH (0x0018 >> 2)
#define IOMMU_PGFLUSH_MASK 0xffffffff
#define IOMMU_AFSR (0x1000 >> 2)
#define IOMMU_AFSR_ERR 0x80000000 /* LE, TO, or BE asserted */
#define IOMMU_AFSR_LE 0x40000000 /* SBUS reports error after
transaction */
#define IOMMU_AFSR_TO 0x20000000 /* Write access took more than
12.8 us. */
#define IOMMU_AFSR_BE 0x10000000 /* Write access received error
acknowledge */
#define IOMMU_AFSR_SIZE 0x0e000000 /* Size of transaction causing error */
#define IOMMU_AFSR_S 0x01000000 /* Sparc was in supervisor mode */
#define IOMMU_AFSR_RESV 0x00800000 /* Reserved, forced to 0x8 by
hardware */
#define IOMMU_AFSR_ME 0x00080000 /* Multiple errors occurred */
#define IOMMU_AFSR_RD 0x00040000 /* A read operation was in progress */
#define IOMMU_AFSR_FAV 0x00020000 /* IOMMU afar has valid contents */
#define IOMMU_AFSR_MASK 0xff0fffff
#define IOMMU_AFAR (0x1004 >> 2)
#define IOMMU_AER (0x1008 >> 2) /* Arbiter Enable Register */
#define IOMMU_AER_EN_P0_ARB 0x00000001 /* MBus master 0x8 (Always 1) */
#define IOMMU_AER_EN_P1_ARB 0x00000002 /* MBus master 0x9 */
#define IOMMU_AER_EN_P2_ARB 0x00000004 /* MBus master 0xa */
#define IOMMU_AER_EN_P3_ARB 0x00000008 /* MBus master 0xb */
#define IOMMU_AER_EN_0 0x00010000 /* SBus slot 0 */
#define IOMMU_AER_EN_1 0x00020000 /* SBus slot 1 */
#define IOMMU_AER_EN_2 0x00040000 /* SBus slot 2 */
#define IOMMU_AER_EN_3 0x00080000 /* SBus slot 3 */
#define IOMMU_AER_EN_F 0x00100000 /* SBus on-board */
#define IOMMU_AER_SBW 0x80000000 /* S-to-M asynchronous writes */
#define IOMMU_AER_MASK 0x801f000f
#define IOMMU_SBCFG0 (0x1010 >> 2) /* SBUS configration per-slot */
#define IOMMU_SBCFG1 (0x1014 >> 2) /* SBUS configration per-slot */
#define IOMMU_SBCFG2 (0x1018 >> 2) /* SBUS configration per-slot */
#define IOMMU_SBCFG3 (0x101c >> 2) /* SBUS configration per-slot */
#define IOMMU_SBCFG_SAB30 0x00010000 /* Phys-address bit 30 when
bypass enabled */
#define IOMMU_SBCFG_BA16 0x00000004 /* Slave supports 16 byte bursts */
#define IOMMU_SBCFG_BA8 0x00000002 /* Slave supports 8 byte bursts */
#define IOMMU_SBCFG_BYPASS 0x00000001 /* Bypass IOMMU, treat all addresses
produced by this device as pure
physical. */
#define IOMMU_SBCFG_MASK 0x00010003
#define IOMMU_ARBEN (0x2000 >> 2) /* SBUS arbitration enable */
#define IOMMU_ARBEN_MASK 0x001f0000
#define IOMMU_MID 0x00000008
#define IOMMU_MASK_ID (0x3018 >> 2) /* Mask ID */
#define IOMMU_MASK_ID_MASK 0x00ffffff
#define IOMMU_MSII_MASK 0x26000000 /* microSPARC II mask number */
#define IOMMU_TS_MASK 0x23000000 /* turboSPARC mask number */
/* The format of an iopte in the page tables */
#define IOPTE_PAGE 0xffffff00 /* Physical page number (PA[35:12]) */
#define IOPTE_CACHE 0x00000080 /* Cached (in vme IOCACHE or
Viking/MXCC) */
#define IOPTE_WRITE 0x00000004 /* Writeable */
#define IOPTE_VALID 0x00000002 /* IOPTE is valid */
#define IOPTE_WAZ 0x00000001 /* Write as zeros */
#define IOMMU_PAGE_SHIFT 12
#define IOMMU_PAGE_SIZE (1 << IOMMU_PAGE_SHIFT)
#define IOMMU_PAGE_MASK ~(IOMMU_PAGE_SIZE - 1)
typedef struct IOMMUState {
SysBusDevice busdev;
uint32_t regs[IOMMU_NREGS];
target_phys_addr_t iostart;
uint32_t version;
qemu_irq irq;
} IOMMUState;
static uint32_t iommu_mem_readl(void *opaque, target_phys_addr_t addr)
{
IOMMUState *s = opaque;
target_phys_addr_t saddr;
uint32_t ret;
saddr = addr >> 2;
switch (saddr) {
default:
ret = s->regs[saddr];
break;
case IOMMU_AFAR:
case IOMMU_AFSR:
ret = s->regs[saddr];
qemu_irq_lower(s->irq);
break;
}
trace_sun4m_iommu_mem_readl(saddr, ret);
return ret;
}
static void iommu_mem_writel(void *opaque, target_phys_addr_t addr,
uint32_t val)
{
IOMMUState *s = opaque;
target_phys_addr_t saddr;
saddr = addr >> 2;
trace_sun4m_iommu_mem_writel(saddr, val);
switch (saddr) {
case IOMMU_CTRL:
switch (val & IOMMU_CTRL_RNGE) {
case IOMMU_RNGE_16MB:
s->iostart = 0xffffffffff000000ULL;
break;
case IOMMU_RNGE_32MB:
s->iostart = 0xfffffffffe000000ULL;
break;
case IOMMU_RNGE_64MB:
s->iostart = 0xfffffffffc000000ULL;
break;
case IOMMU_RNGE_128MB:
s->iostart = 0xfffffffff8000000ULL;
break;
case IOMMU_RNGE_256MB:
s->iostart = 0xfffffffff0000000ULL;
break;
case IOMMU_RNGE_512MB:
s->iostart = 0xffffffffe0000000ULL;
break;
case IOMMU_RNGE_1GB:
s->iostart = 0xffffffffc0000000ULL;
break;
default:
case IOMMU_RNGE_2GB:
s->iostart = 0xffffffff80000000ULL;
break;
}
trace_sun4m_iommu_mem_writel_ctrl(s->iostart);
s->regs[saddr] = ((val & IOMMU_CTRL_MASK) | s->version);
break;
case IOMMU_BASE:
s->regs[saddr] = val & IOMMU_BASE_MASK;
break;
case IOMMU_TLBFLUSH:
trace_sun4m_iommu_mem_writel_tlbflush(val);
s->regs[saddr] = val & IOMMU_TLBFLUSH_MASK;
break;
case IOMMU_PGFLUSH:
trace_sun4m_iommu_mem_writel_pgflush(val);
s->regs[saddr] = val & IOMMU_PGFLUSH_MASK;
break;
case IOMMU_AFAR:
s->regs[saddr] = val;
qemu_irq_lower(s->irq);
break;
case IOMMU_AER:
s->regs[saddr] = (val & IOMMU_AER_MASK) | IOMMU_AER_EN_P0_ARB;
break;
case IOMMU_AFSR:
s->regs[saddr] = (val & IOMMU_AFSR_MASK) | IOMMU_AFSR_RESV;
qemu_irq_lower(s->irq);
break;
case IOMMU_SBCFG0:
case IOMMU_SBCFG1:
case IOMMU_SBCFG2:
case IOMMU_SBCFG3:
s->regs[saddr] = val & IOMMU_SBCFG_MASK;
break;
case IOMMU_ARBEN:
// XXX implement SBus probing: fault when reading unmapped
// addresses, fault cause and address stored to MMU/IOMMU
s->regs[saddr] = (val & IOMMU_ARBEN_MASK) | IOMMU_MID;
break;
case IOMMU_MASK_ID:
s->regs[saddr] |= val & IOMMU_MASK_ID_MASK;
break;
default:
s->regs[saddr] = val;
break;
}
}
static CPUReadMemoryFunc * const iommu_mem_read[3] = {
NULL,
NULL,
iommu_mem_readl,
};
static CPUWriteMemoryFunc * const iommu_mem_write[3] = {
NULL,
NULL,
iommu_mem_writel,
};
static uint32_t iommu_page_get_flags(IOMMUState *s, target_phys_addr_t addr)
{
uint32_t ret;
target_phys_addr_t iopte;
target_phys_addr_t pa = addr;
iopte = s->regs[IOMMU_BASE] << 4;
addr &= ~s->iostart;
iopte += (addr >> (IOMMU_PAGE_SHIFT - 2)) & ~3;
cpu_physical_memory_read(iopte, (uint8_t *)&ret, 4);
tswap32s(&ret);
trace_sun4m_iommu_page_get_flags(pa, iopte, ret);
return ret;
}
static target_phys_addr_t iommu_translate_pa(target_phys_addr_t addr,
uint32_t pte)
{
target_phys_addr_t pa;
pa = ((pte & IOPTE_PAGE) << 4) + (addr & ~IOMMU_PAGE_MASK);
trace_sun4m_iommu_translate_pa(addr, pa, pte);
return pa;
}
static void iommu_bad_addr(IOMMUState *s, target_phys_addr_t addr,
int is_write)
{
trace_sun4m_iommu_bad_addr(addr);
s->regs[IOMMU_AFSR] = IOMMU_AFSR_ERR | IOMMU_AFSR_LE | IOMMU_AFSR_RESV |
IOMMU_AFSR_FAV;
if (!is_write)
s->regs[IOMMU_AFSR] |= IOMMU_AFSR_RD;
s->regs[IOMMU_AFAR] = addr;
qemu_irq_raise(s->irq);
}
void sparc_iommu_memory_rw(void *opaque, target_phys_addr_t addr,
uint8_t *buf, int len, int is_write)
{
int l;
uint32_t flags;
target_phys_addr_t page, phys_addr;
while (len > 0) {
page = addr & IOMMU_PAGE_MASK;
l = (page + IOMMU_PAGE_SIZE) - addr;
if (l > len)
l = len;
flags = iommu_page_get_flags(opaque, page);
if (!(flags & IOPTE_VALID)) {
iommu_bad_addr(opaque, page, is_write);
return;
}
phys_addr = iommu_translate_pa(addr, flags);
if (is_write) {
if (!(flags & IOPTE_WRITE)) {
iommu_bad_addr(opaque, page, is_write);
return;
}
cpu_physical_memory_write(phys_addr, buf, l);
} else {
cpu_physical_memory_read(phys_addr, buf, l);
}
len -= l;
buf += l;
addr += l;
}
}
static const VMStateDescription vmstate_iommu = {
.name ="iommu",
.version_id = 2,
.minimum_version_id = 2,
.minimum_version_id_old = 2,
.fields = (VMStateField []) {
VMSTATE_UINT32_ARRAY(regs, IOMMUState, IOMMU_NREGS),
VMSTATE_UINT64(iostart, IOMMUState),
VMSTATE_END_OF_LIST()
}
};
static void iommu_reset(DeviceState *d)
{
IOMMUState *s = container_of(d, IOMMUState, busdev.qdev);
memset(s->regs, 0, IOMMU_NREGS * 4);
s->iostart = 0;
s->regs[IOMMU_CTRL] = s->version;
s->regs[IOMMU_ARBEN] = IOMMU_MID;
s->regs[IOMMU_AFSR] = IOMMU_AFSR_RESV;
s->regs[IOMMU_AER] = IOMMU_AER_EN_P0_ARB | IOMMU_AER_EN_P1_ARB;
s->regs[IOMMU_MASK_ID] = IOMMU_TS_MASK;
}
static int iommu_init1(SysBusDevice *dev)
{
IOMMUState *s = FROM_SYSBUS(IOMMUState, dev);
int io;
sysbus_init_irq(dev, &s->irq);
io = cpu_register_io_memory(iommu_mem_read, iommu_mem_write, s,
DEVICE_NATIVE_ENDIAN);
sysbus_init_mmio(dev, IOMMU_NREGS * sizeof(uint32_t), io);
return 0;
}
static SysBusDeviceInfo iommu_info = {
.init = iommu_init1,
.qdev.name = "iommu",
.qdev.size = sizeof(IOMMUState),
.qdev.vmsd = &vmstate_iommu,
.qdev.reset = iommu_reset,
.qdev.props = (Property[]) {
DEFINE_PROP_HEX32("version", IOMMUState, version, 0),
DEFINE_PROP_END_OF_LIST(),
}
};
static void iommu_register_devices(void)
{
sysbus_register_withprop(&iommu_info);
}
device_init(iommu_register_devices)
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