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author | Andreas Sandberg <andreas.sandberg@arm.com> | 2015-07-07 10:03:14 +0100 |
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committer | Andreas Sandberg <andreas.sandberg@arm.com> | 2015-07-07 10:03:14 +0100 |
commit | a74c446e7d034cebe01babb92f448a145b4ba77d (patch) | |
tree | 86fe8e283759ba865e3afb23646775c32c8ccffd /src/dev/arm/gpu_nomali.hh | |
parent | c2740578404b4e46d198de70af1cfd554033d99f (diff) | |
download | gem5-a74c446e7d034cebe01babb92f448a145b4ba77d.tar.xz |
dev, arm: Add a device model that uses the NoMali model
Add a simple device shim that interfaces with the NoMali model
library. The gem5 side of the interface supports Mali T60x/T62x/T760
GPUs. This device model pretends to be a Mali GPU, but doesn't render
anything and executes in zero time.
Diffstat (limited to 'src/dev/arm/gpu_nomali.hh')
-rw-r--r-- | src/dev/arm/gpu_nomali.hh | 130 |
1 files changed, 130 insertions, 0 deletions
diff --git a/src/dev/arm/gpu_nomali.hh b/src/dev/arm/gpu_nomali.hh new file mode 100644 index 000000000..bc687c264 --- /dev/null +++ b/src/dev/arm/gpu_nomali.hh @@ -0,0 +1,130 @@ +/* + * Copyright (c) 2014-2015 ARM Limited + * All rights reserved + * + * The license below extends only to copyright in the software and shall + * not be construed as granting a license to any other intellectual + * property including but not limited to intellectual property relating + * to a hardware implementation of the functionality of the software + * licensed hereunder. You may use the software subject to the license + * terms below provided that you ensure that this notice is replicated + * unmodified and in its entirety in all distributions of the software, + * modified or unmodified, in source code or in binary form. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are + * met: redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer; + * redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution; + * neither the name of the copyright holders nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + * Authors: Andreas Sandberg + */ + +#ifndef __DEV_ARM_NOMALI_GPU_HH__ +#define __DEV_ARM_NOMALI_GPU_HH__ + +#include <map> + +#include "dev/io_device.hh" +#include "libnomali/nomali.h" + +class NoMaliGpuParams; +class RealView; + +class NoMaliGpu : public PioDevice +{ + public: + NoMaliGpu(const NoMaliGpuParams *p); + virtual ~NoMaliGpu(); + + public: /* Checkpointing */ + void serialize(CheckpointOut &cp) const M5_ATTR_OVERRIDE; + void unserialize(CheckpointIn &cp) M5_ATTR_OVERRIDE; + + public: /* IO device interfaces */ + Tick read(PacketPtr pkt) M5_ATTR_OVERRIDE; + Tick write(PacketPtr pkt) M5_ATTR_OVERRIDE; + AddrRangeList getAddrRanges() const M5_ATTR_OVERRIDE; + + private: + /** + * Interrupt callback from the NoMali library. + * + * This method calls onInterrupt() on the NoMaliGpu owning this + * device. + * + * @param h NoMali library handle. + * @param usr Pointer to an instance of the NoMaliGpu + * @param intno GPU interrupt type + * @param set Was the interrupt raised (1) or lowered (0)? + */ + static void _interrupt(nomali_handle_t h, void *usr, + nomali_int_t intno, int set); + + void onInterrupt(nomali_handle_t h, nomali_int_t intno, bool set); + + /** Wrapper around nomali_reg_read(). */ + uint32_t readReg(nomali_addr_t reg); + /** Wrapper around nomali_reg_write(). */ + void writeReg(nomali_addr_t reg, uint32_t value); + + /** Wrapper around nomali_reg_read_raw(). */ + uint32_t readRegRaw(nomali_addr_t reg) const; + /** Wrapper around nomali_reg_write_raw(). */ + void writeRegRaw(nomali_addr_t reg, uint32_t value); + + /** + * Format a NoMali error into an error message and panic. + * + * @param err Error code from the NoMali library. + * @param msg Message to print. + */ + static void gpuPanic(nomali_error_t err, const char *msg) M5_ATTR_NORETURN; + /** + * Panic if the NoMali returned an error, do nothing otherwise. + * + * @param err Error code from the NoMali library. + * @param msg Message to print when panicking. + */ + static void panicOnErr(nomali_error_t err, const char *msg) { + if (err != NOMALI_E_OK) + gpuPanic(err, msg); + } + + /** Device base address */ + const Addr pioAddr; + + /** Platform, used to discover GIC */ + RealView *const platform; + + /** Map between NoMali interrupt types and actual GIC + * interrupts */ + const std::map<nomali_int_t, uint32_t> interruptMap; + + + /** Cached information struct from the NoMali library */ + nomali_info_t nomaliInfo; + + /** Handle of a NoMali library instance */ + nomali_handle_t nomali; +}; + + +#endif // __DEV_ARM_NOMALI_GPU_HH__ |