On 03/10/2023 14:32, Marek Vasut wrote: > On 9/20/23 14:42, Paul Barker wrote: >> The memory map for the RZ/G2L family differs from that of previous R-Car >> gen3/gen4 SoCs. > > Gen3 / Gen4 > >> A high level memory map can be seen in figure 5.2 (section 5.2.1) of the >> RZ/G2L data sheet rev 1.30 published May 12, 2023. A summary is included >> here (note that this is a 34-bit address space): >> * 0x0_0000_0000 - 0x0_0002_FFFF SRAM area >> * 0x0_0003_0000 - 0x0_0FFF_FFFF Reserved area >> * 0x0_1000_0000 - 0x0_1FFF_FFFF I/O register area >> * 0x0_2000_0000 - 0x0_2FFF_FFFF SPI Multi area >> * 0x0_3000_0000 - 0x0_3FFF_FFFF Reserved area >> * 0x0_4000_0000 - 0x1_3FFF_FFFF DDR area (4 GiB) >> * 0x1_4000_0000 - 0x3_FFFF_FFFF Reserved area >> >> Within the DDR area, the first 128 MiB are reserved by TrustedFirmware. >> >> Signed-off-by: Paul Barker <paul.barker...@bp.renesas.com> >> Reviewed-by: Biju Das <biju.das...@bp.renesas.com> >> Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad...@bp.renesas.com> >> --- >> arch/arm/mach-rmobile/Makefile | 8 +- >> arch/arm/mach-rmobile/memmap-rzg2l.c | 115 +++++++++++++++++++++++++++ >> 2 files changed, 119 insertions(+), 4 deletions(-) >> create mode 100644 arch/arm/mach-rmobile/memmap-rzg2l.c >> >> diff --git a/arch/arm/mach-rmobile/Makefile b/arch/arm/mach-rmobile/Makefile >> index 45d6a0e2a28a..ff8b0c7bae25 100644 >> --- a/arch/arm/mach-rmobile/Makefile >> +++ b/arch/arm/mach-rmobile/Makefile >> @@ -10,11 +10,11 @@ obj-$(CONFIG_DISPLAY_BOARDINFO) += board.o >> obj-$(CONFIG_TMU_TIMER) += ../../sh/lib/time.o >> obj-$(CONFIG_R8A7740) += lowlevel_init.o cpu_info-r8a7740.o pfc-r8a7740.o >> obj-$(CONFIG_RCAR_GEN2) += lowlevel_init_ca15.o cpu_info-rcar.o >> -obj-$(CONFIG_RCAR_64) += lowlevel_init_gen3.o memmap-gen3.o >> -obj-$(CONFIG_RCAR_GEN3) += cpu_info-rcar.o >> -obj-$(CONFIG_RCAR_GEN4) += cpu_info-rcar.o >> +obj-$(CONFIG_RCAR_64) += lowlevel_init_gen3.o >> +obj-$(CONFIG_RCAR_GEN3) += cpu_info-rcar.o memmap-gen3.o >> +obj-$(CONFIG_RCAR_GEN4) += cpu_info-rcar.o memmap-gen3.o >> obj-$(CONFIG_RZ_G2) += cpu_info-rzg.o >> -obj-$(CONFIG_RZG2L) += cpu_info-rzg2l.o >> +obj-$(CONFIG_RZG2L) += cpu_info-rzg2l.o memmap-rzg2l.o >> >> ifneq ($(CONFIG_R8A779A0),) >> obj-$(CONFIG_ARMV8_PSCI) += psci-r8a779a0.o >> diff --git a/arch/arm/mach-rmobile/memmap-rzg2l.c >> b/arch/arm/mach-rmobile/memmap-rzg2l.c >> new file mode 100644 >> index 000000000000..d0509424fb73 >> --- /dev/null >> +++ b/arch/arm/mach-rmobile/memmap-rzg2l.c >> @@ -0,0 +1,115 @@ >> +// SPDX-License-Identifier: GPL-2.0+ >> +/* >> + * Renesas RZ/G2L family memory map tables >> + * >> + * Copyright (C) 2017 Marek Vasut <marek.va...@gmail.com> >> + * Copyright (C) 2023 Renesas Electronics Corp. >> + */ >> + >> +#include <common.h> >> +#include <asm/armv8/mmu.h> >> +#include <asm/global_data.h> >> +#include <cpu_func.h> >> + >> +#define RZG2L_NR_REGIONS 16 >> + >> +/* >> + * RZ/G2L supports up to 4 GiB RAM starting at 0x40000000, of >> + * which the first 128 MiB is reserved by TF-A. >> + */ > > Are those 4 GiB continuous , or is there some "low" mem alias and then > full "high" mem above the 32bit barrier ?
This is a contiguous 4GB region, there's no aliased region on these SoCs. > >> +static struct mm_region rzg2l_mem_map[RZG2L_NR_REGIONS] = { >> + { >> + .virt = 0x0UL, >> + .phys = 0x0UL, >> + .size = 0x40000000UL, >> + .attrs = PTE_BLOCK_MEMTYPE(MT_DEVICE_NGNRNE) | >> + PTE_BLOCK_NON_SHARE | >> + PTE_BLOCK_PXN | PTE_BLOCK_UXN >> + }, { >> + .virt = 0x40000000UL, >> + .phys = 0x40000000UL, >> + .size = 0x03F00000UL, >> + .attrs = PTE_BLOCK_MEMTYPE(MT_NORMAL) | >> + PTE_BLOCK_INNER_SHARE >> + }, { >> + .virt = 0x47E00000UL, > > What's this part about ? This is copied from the RCar Gen3 memory map. > >> + .phys = 0x47E00000UL, >> + .size = 0xF8200000UL, >> + .attrs = PTE_BLOCK_MEMTYPE(MT_NORMAL) | >> + PTE_BLOCK_INNER_SHARE >> + }, { >> + /* List terminator */ >> + 0, >> + } >> +}; >> + >> +struct mm_region *mem_map = rzg2l_mem_map; >> + >> +DECLARE_GLOBAL_DATA_PTR; >> + >> +#define debug_memmap(i, map) \ >> + debug("memmap %d: virt 0x%llx -> phys 0x%llx, size=0x%llx, >> attrs=0x%llx\n", \ >> + i, map[i].virt, map[i].phys, map[i].size, map[i].attrs) >> + >> +void enable_caches(void) >> +{ >> + unsigned int bank, i = 0; >> + u64 start, size; >> + >> + /* Create map for register access */ >> + rzg2l_mem_map[i].virt = 0x0ULL; >> + rzg2l_mem_map[i].phys = 0x0ULL; >> + rzg2l_mem_map[i].size = 0x40000000ULL; >> + rzg2l_mem_map[i].attrs = PTE_BLOCK_MEMTYPE(MT_DEVICE_NGNRNE) | >> + PTE_BLOCK_NON_SHARE | >> + PTE_BLOCK_PXN | PTE_BLOCK_UXN; >> + debug_memmap(i, rzg2l_mem_map); >> + i++; >> + >> + /* Generate entries for DRAM in 32bit address space */ >> + for (bank = 0; bank < CONFIG_NR_DRAM_BANKS; bank++) { >> + start = gd->bd->bi_dram[bank].start; >> + size = gd->bd->bi_dram[bank].size; >> + >> + /* Skip empty DRAM banks */ >> + if (!size) >> + continue; >> + >> + /* Mark memory reserved by ATF as cacheable too. */ >> + if (start == 0x48000000) { >> + /* Unmark protection area (0x43F00000 to 0x47DFFFFF) */ >> + rzg2l_mem_map[i].virt = 0x40000000ULL; >> + rzg2l_mem_map[i].phys = 0x40000000ULL; >> + rzg2l_mem_map[i].size = 0x03F00000ULL; >> + rzg2l_mem_map[i].attrs = PTE_BLOCK_MEMTYPE(MT_NORMAL) | >> + PTE_BLOCK_INNER_SHARE; >> + debug_memmap(i, rzg2l_mem_map); >> + i++; >> + >> + start = 0x47E00000ULL; >> + size += 0x00200000ULL; >> + } >> + >> + rzg2l_mem_map[i].virt = start; >> + rzg2l_mem_map[i].phys = start; >> + rzg2l_mem_map[i].size = size; >> + rzg2l_mem_map[i].attrs = PTE_BLOCK_MEMTYPE(MT_NORMAL) | >> + PTE_BLOCK_INNER_SHARE; >> + debug_memmap(i, rzg2l_mem_map); >> + i++; >> + } > > Is this somehow copied from R-Car ? Can this be deduplicated ? This is based on the R-Car memory map. We discussed internally whether to modify memmap-gen3.c or create a separate memmap-rzg2l.c and decided that it was safer not to change the known working code for R-Car systems. To merge the two, we'll need to add a few if(IS_ENABLED(CONFIG_RZG2L)) conditionals to memmap-gen3.c. I'm happy to do that if that's the approach you'd prefer. Thanks, Paul
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