| Message ID | 20201101163753.15059-1-bmeng.cn@gmail.com |
|---|---|
| State | Superseded |
| Headers | show |
| Series | [v3] hw/riscv: microchip_pfsoc: Correct DDR memory map | expand |
On Sun, Nov 1, 2020 at 8:42 AM Bin Meng <bmeng.cn@gmail.com> wrote: > > From: Bin Meng <bin.meng@windriver.com> > > When system memory is larger than 1 GiB (high memory), PolarFire SoC > maps it at address 0x10_0000_0000. Address 0xC000_0000 and above is > aliased to the same 1 GiB low memory with different cache attributes. > > At present QEMU maps the system memory contiguously from 0x8000_0000. > This corrects the wrong QEMU logic. Note address 0x14_0000_0000 is > the alias to the high memory, and even physical memory is only 1 GiB, > the HSS codes still tries to probe the high memory alias address. > It seems there is no issue on the real hardware, so we will have to > take that into the consideration in our emulation. Due to this, we > we increase the default system memory size to 2047 MiB (the largest > ram size allowed when running on a 32-bit host) so that user gets > notified an error when less than 2047 MiB is specified. Is this better than just not supporting 32-bit hosts? Or could we make this number even lower (as low as possible that still works with HSS)? Alistair > > Signed-off-by: Bin Meng <bin.meng@windriver.com> > > --- > This patch should replace the following commit in Alistair's > riscv-to-apply.next tree: > https://github.com/alistair23/qemu/commit/8c47c1e9df850a928b4b230240a950feabe6152f > > Changes in v3: > - Change default ram size to 2047 MiB for 32-bit host > > hw/riscv/microchip_pfsoc.c | 48 ++++++++++++++++++++++++++---- > include/hw/riscv/microchip_pfsoc.h | 5 +++- > 2 files changed, 46 insertions(+), 7 deletions(-) > > diff --git a/hw/riscv/microchip_pfsoc.c b/hw/riscv/microchip_pfsoc.c > index 44a84732ac..0bc17b3955 100644 > --- a/hw/riscv/microchip_pfsoc.c > +++ b/hw/riscv/microchip_pfsoc.c > @@ -121,7 +121,10 @@ static const struct MemmapEntry { > [MICROCHIP_PFSOC_ENVM_CFG] = { 0x20200000, 0x1000 }, > [MICROCHIP_PFSOC_ENVM_DATA] = { 0x20220000, 0x20000 }, > [MICROCHIP_PFSOC_IOSCB] = { 0x30000000, 0x10000000 }, > - [MICROCHIP_PFSOC_DRAM] = { 0x80000000, 0x0 }, > + [MICROCHIP_PFSOC_DRAM_LO] = { 0x80000000, 0x40000000 }, > + [MICROCHIP_PFSOC_DRAM_LO_ALIAS] = { 0xc0000000, 0x40000000 }, > + [MICROCHIP_PFSOC_DRAM_HI] = { 0x1000000000, 0x0 }, > + [MICROCHIP_PFSOC_DRAM_HI_ALIAS] = { 0x1400000000, 0x0 }, > }; > > static void microchip_pfsoc_soc_instance_init(Object *obj) > @@ -424,7 +427,11 @@ static void microchip_icicle_kit_machine_init(MachineState *machine) > const struct MemmapEntry *memmap = microchip_pfsoc_memmap; > MicrochipIcicleKitState *s = MICROCHIP_ICICLE_KIT_MACHINE(machine); > MemoryRegion *system_memory = get_system_memory(); > - MemoryRegion *main_mem = g_new(MemoryRegion, 1); > + MemoryRegion *mem_low = g_new(MemoryRegion, 1); > + MemoryRegion *mem_low_alias = g_new(MemoryRegion, 1); > + MemoryRegion *mem_high = g_new(MemoryRegion, 1); > + MemoryRegion *mem_high_alias = g_new(MemoryRegion, 1); > + uint64_t mem_high_size; > DriveInfo *dinfo = drive_get_next(IF_SD); > > /* Sanity check on RAM size */ > @@ -441,10 +448,39 @@ static void microchip_icicle_kit_machine_init(MachineState *machine) > qdev_realize(DEVICE(&s->soc), NULL, &error_abort); > > /* Register RAM */ > - memory_region_init_ram(main_mem, NULL, "microchip.icicle.kit.ram", > - machine->ram_size, &error_fatal); > + memory_region_init_ram(mem_low, NULL, "microchip.icicle.kit.ram_low", > + memmap[MICROCHIP_PFSOC_DRAM_LO].size, > + &error_fatal); > + memory_region_init_alias(mem_low_alias, NULL, > + "microchip.icicle.kit.ram_low.alias", > + mem_low, 0, > + memmap[MICROCHIP_PFSOC_DRAM_LO_ALIAS].size); > + memory_region_add_subregion(system_memory, > + memmap[MICROCHIP_PFSOC_DRAM_LO].base, > + mem_low); > + memory_region_add_subregion(system_memory, > + memmap[MICROCHIP_PFSOC_DRAM_LO_ALIAS].base, > + mem_low_alias); > + > + /* > + * Map 1 GiB high memory because HSS will do memory test against the high > + * memory address range regardless of physical memory installed. > + * > + * See memory_tests() in mss_ddr.c in the HSS source code. > + */ > + mem_high_size = machine->ram_size - 1 * GiB; > + > + memory_region_init_ram(mem_high, NULL, "microchip.icicle.kit.ram_high", > + mem_high_size, &error_fatal); > + memory_region_init_alias(mem_high_alias, NULL, > + "microchip.icicle.kit.ram_high.alias", > + mem_high, 0, mem_high_size); > + memory_region_add_subregion(system_memory, > + memmap[MICROCHIP_PFSOC_DRAM_HI].base, > + mem_high); > memory_region_add_subregion(system_memory, > - memmap[MICROCHIP_PFSOC_DRAM].base, main_mem); > + memmap[MICROCHIP_PFSOC_DRAM_HI_ALIAS].base, > + mem_high_alias); > > /* Load the firmware */ > riscv_find_and_load_firmware(machine, BIOS_FILENAME, RESET_VECTOR, NULL); > @@ -470,7 +506,7 @@ static void microchip_icicle_kit_machine_class_init(ObjectClass *oc, void *data) > MICROCHIP_PFSOC_COMPUTE_CPU_COUNT; > mc->min_cpus = MICROCHIP_PFSOC_MANAGEMENT_CPU_COUNT + 1; > mc->default_cpus = mc->min_cpus; > - mc->default_ram_size = 1 * GiB; > + mc->default_ram_size = 2047 * MiB; > } > > static const TypeInfo microchip_icicle_kit_machine_typeinfo = { > diff --git a/include/hw/riscv/microchip_pfsoc.h b/include/hw/riscv/microchip_pfsoc.h > index f34a6b3fd7..db77e9c84a 100644 > --- a/include/hw/riscv/microchip_pfsoc.h > +++ b/include/hw/riscv/microchip_pfsoc.h > @@ -105,7 +105,10 @@ enum { > MICROCHIP_PFSOC_ENVM_CFG, > MICROCHIP_PFSOC_ENVM_DATA, > MICROCHIP_PFSOC_IOSCB, > - MICROCHIP_PFSOC_DRAM, > + MICROCHIP_PFSOC_DRAM_LO, > + MICROCHIP_PFSOC_DRAM_LO_ALIAS, > + MICROCHIP_PFSOC_DRAM_HI, > + MICROCHIP_PFSOC_DRAM_HI_ALIAS > }; > > enum { > -- > 2.25.1 > >
Hi Alistair, On Mon, Nov 2, 2020 at 12:46 AM Alistair Francis <alistair23@gmail.com> wrote: > > On Sun, Nov 1, 2020 at 8:42 AM Bin Meng <bmeng.cn@gmail.com> wrote: > > > > From: Bin Meng <bin.meng@windriver.com> > > > > When system memory is larger than 1 GiB (high memory), PolarFire SoC > > maps it at address 0x10_0000_0000. Address 0xC000_0000 and above is > > aliased to the same 1 GiB low memory with different cache attributes. > > > > At present QEMU maps the system memory contiguously from 0x8000_0000. > > This corrects the wrong QEMU logic. Note address 0x14_0000_0000 is > > the alias to the high memory, and even physical memory is only 1 GiB, > > the HSS codes still tries to probe the high memory alias address. > > It seems there is no issue on the real hardware, so we will have to > > take that into the consideration in our emulation. Due to this, we > > we increase the default system memory size to 2047 MiB (the largest > > ram size allowed when running on a 32-bit host) so that user gets > > notified an error when less than 2047 MiB is specified. > > Is this better than just not supporting 32-bit hosts? Or could we make I am not sure if we have a general rule about discontinuing 32-bit hosts support, i.e.: deprecating 32-bit hosts at some time? > this number even lower (as low as possible that still works with HSS)? > Sure I will figure this out and set this number to meet the minium requirement of HSS. Regards, Bin
On Sun, Nov 1, 2020 at 8:51 AM Bin Meng <bmeng.cn@gmail.com> wrote: > > Hi Alistair, > > On Mon, Nov 2, 2020 at 12:46 AM Alistair Francis <alistair23@gmail.com> wrote: > > > > On Sun, Nov 1, 2020 at 8:42 AM Bin Meng <bmeng.cn@gmail.com> wrote: > > > > > > From: Bin Meng <bin.meng@windriver.com> > > > > > > When system memory is larger than 1 GiB (high memory), PolarFire SoC > > > maps it at address 0x10_0000_0000. Address 0xC000_0000 and above is > > > aliased to the same 1 GiB low memory with different cache attributes. > > > > > > At present QEMU maps the system memory contiguously from 0x8000_0000. > > > This corrects the wrong QEMU logic. Note address 0x14_0000_0000 is > > > the alias to the high memory, and even physical memory is only 1 GiB, > > > the HSS codes still tries to probe the high memory alias address. > > > It seems there is no issue on the real hardware, so we will have to > > > take that into the consideration in our emulation. Due to this, we > > > we increase the default system memory size to 2047 MiB (the largest > > > ram size allowed when running on a 32-bit host) so that user gets > > > notified an error when less than 2047 MiB is specified. > > > > Is this better than just not supporting 32-bit hosts? Or could we make > > I am not sure if we have a general rule about discontinuing 32-bit > hosts support, i.e.: deprecating 32-bit hosts at some time? > > > this number even lower (as low as possible that still works with HSS)? > > > > Sure I will figure this out and set this number to meet the minium > requirement of HSS. Thanks, that's probably the best bet for both 32 and 64-bit hosts then. Alistair > > Regards, > Bin
diff --git a/hw/riscv/microchip_pfsoc.c b/hw/riscv/microchip_pfsoc.c index 44a84732ac..0bc17b3955 100644 --- a/hw/riscv/microchip_pfsoc.c +++ b/hw/riscv/microchip_pfsoc.c @@ -121,7 +121,10 @@ static const struct MemmapEntry { [MICROCHIP_PFSOC_ENVM_CFG] = { 0x20200000, 0x1000 }, [MICROCHIP_PFSOC_ENVM_DATA] = { 0x20220000, 0x20000 }, [MICROCHIP_PFSOC_IOSCB] = { 0x30000000, 0x10000000 }, - [MICROCHIP_PFSOC_DRAM] = { 0x80000000, 0x0 }, + [MICROCHIP_PFSOC_DRAM_LO] = { 0x80000000, 0x40000000 }, + [MICROCHIP_PFSOC_DRAM_LO_ALIAS] = { 0xc0000000, 0x40000000 }, + [MICROCHIP_PFSOC_DRAM_HI] = { 0x1000000000, 0x0 }, + [MICROCHIP_PFSOC_DRAM_HI_ALIAS] = { 0x1400000000, 0x0 }, }; static void microchip_pfsoc_soc_instance_init(Object *obj) @@ -424,7 +427,11 @@ static void microchip_icicle_kit_machine_init(MachineState *machine) const struct MemmapEntry *memmap = microchip_pfsoc_memmap; MicrochipIcicleKitState *s = MICROCHIP_ICICLE_KIT_MACHINE(machine); MemoryRegion *system_memory = get_system_memory(); - MemoryRegion *main_mem = g_new(MemoryRegion, 1); + MemoryRegion *mem_low = g_new(MemoryRegion, 1); + MemoryRegion *mem_low_alias = g_new(MemoryRegion, 1); + MemoryRegion *mem_high = g_new(MemoryRegion, 1); + MemoryRegion *mem_high_alias = g_new(MemoryRegion, 1); + uint64_t mem_high_size; DriveInfo *dinfo = drive_get_next(IF_SD); /* Sanity check on RAM size */ @@ -441,10 +448,39 @@ static void microchip_icicle_kit_machine_init(MachineState *machine) qdev_realize(DEVICE(&s->soc), NULL, &error_abort); /* Register RAM */ - memory_region_init_ram(main_mem, NULL, "microchip.icicle.kit.ram", - machine->ram_size, &error_fatal); + memory_region_init_ram(mem_low, NULL, "microchip.icicle.kit.ram_low", + memmap[MICROCHIP_PFSOC_DRAM_LO].size, + &error_fatal); + memory_region_init_alias(mem_low_alias, NULL, + "microchip.icicle.kit.ram_low.alias", + mem_low, 0, + memmap[MICROCHIP_PFSOC_DRAM_LO_ALIAS].size); + memory_region_add_subregion(system_memory, + memmap[MICROCHIP_PFSOC_DRAM_LO].base, + mem_low); + memory_region_add_subregion(system_memory, + memmap[MICROCHIP_PFSOC_DRAM_LO_ALIAS].base, + mem_low_alias); + + /* + * Map 1 GiB high memory because HSS will do memory test against the high + * memory address range regardless of physical memory installed. + * + * See memory_tests() in mss_ddr.c in the HSS source code. + */ + mem_high_size = machine->ram_size - 1 * GiB; + + memory_region_init_ram(mem_high, NULL, "microchip.icicle.kit.ram_high", + mem_high_size, &error_fatal); + memory_region_init_alias(mem_high_alias, NULL, + "microchip.icicle.kit.ram_high.alias", + mem_high, 0, mem_high_size); + memory_region_add_subregion(system_memory, + memmap[MICROCHIP_PFSOC_DRAM_HI].base, + mem_high); memory_region_add_subregion(system_memory, - memmap[MICROCHIP_PFSOC_DRAM].base, main_mem); + memmap[MICROCHIP_PFSOC_DRAM_HI_ALIAS].base, + mem_high_alias); /* Load the firmware */ riscv_find_and_load_firmware(machine, BIOS_FILENAME, RESET_VECTOR, NULL); @@ -470,7 +506,7 @@ static void microchip_icicle_kit_machine_class_init(ObjectClass *oc, void *data) MICROCHIP_PFSOC_COMPUTE_CPU_COUNT; mc->min_cpus = MICROCHIP_PFSOC_MANAGEMENT_CPU_COUNT + 1; mc->default_cpus = mc->min_cpus; - mc->default_ram_size = 1 * GiB; + mc->default_ram_size = 2047 * MiB; } static const TypeInfo microchip_icicle_kit_machine_typeinfo = { diff --git a/include/hw/riscv/microchip_pfsoc.h b/include/hw/riscv/microchip_pfsoc.h index f34a6b3fd7..db77e9c84a 100644 --- a/include/hw/riscv/microchip_pfsoc.h +++ b/include/hw/riscv/microchip_pfsoc.h @@ -105,7 +105,10 @@ enum { MICROCHIP_PFSOC_ENVM_CFG, MICROCHIP_PFSOC_ENVM_DATA, MICROCHIP_PFSOC_IOSCB, - MICROCHIP_PFSOC_DRAM, + MICROCHIP_PFSOC_DRAM_LO, + MICROCHIP_PFSOC_DRAM_LO_ALIAS, + MICROCHIP_PFSOC_DRAM_HI, + MICROCHIP_PFSOC_DRAM_HI_ALIAS }; enum {