| Message ID | 20250120015254.124447-1-gch981213@gmail.com (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | mips: add support for Siflower MIPS SoCs | expand |
在2025年1月20日一月 上午1:52，Chuanhong Guo写道： > Siflower MIPS SoCs like SF19A2890 uses dual-core MIPS InterAptiv > processor, built-in GMAC, USB, dual-band WiFi and various other > peripherals. > Notably, it uses some ARM PLxxx peripherals, and ARM_AMBA is > selected for the drivers. > Most devices on the market with this chip come with 64M or less > DRAM. A kmalloc.h with malloc alignment override is added to > conserve memory, and a MACH_SIFLOWER_MIPS is created with reduced > features instead of using the generic kernel. > > Signed-off-by: Chuanhong Guo <gch981213@gmail.com> Hmm, why not using MIPS_GENERIC. Thanks - Jiaxun [...]
On Wed, Jan 22, 2025 at 8:05 PM Jiaxun Yang <jiaxun.yang@flygoat.com> wrote: > > > > 在2025年1月20日一月 上午1:52，Chuanhong Guo写道： > > Siflower MIPS SoCs like SF19A2890 uses dual-core MIPS InterAptiv > > processor, built-in GMAC, USB, dual-band WiFi and various other > > peripherals. > > Notably, it uses some ARM PLxxx peripherals, and ARM_AMBA is > > selected for the drivers. > > Most devices on the market with this chip come with 64M or less > > DRAM. A kmalloc.h with malloc alignment override is added to > > conserve memory, and a MACH_SIFLOWER_MIPS is created with reduced > > features instead of using the generic kernel. > > > > Signed-off-by: Chuanhong Guo <gch981213@gmail.com> > > Hmm, why not using MIPS_GENERIC. Mainly to override MIPS_L1_CACHE_SHIFT and ARCH_DMA_MINALIGN. This saves about 1MB of memory if I remember correctly.
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig index 1924f2d83932..e26636f2bc66 100644 --- a/arch/mips/Kconfig +++ b/arch/mips/Kconfig @@ -895,6 +895,36 @@ config SIBYTE_BIGSUR select ZONE_DMA32 if 64BIT select SWIOTLB if ARCH_DMA_ADDR_T_64BIT && PCI +config MACH_SIFLOWER_MIPS + bool "Siflower MIPS SoCs" + select MIPS_GENERIC + select MACH_GENERIC_CORE + select ARM_AMBA + select BOOT_RAW + select CEVT_R4K + select CLKSRC_MIPS_GIC + select COMMON_CLK + select CPU_MIPSR2_IRQ_EI + select CPU_MIPSR2_IRQ_VI + select CSRC_R4K + select DMA_NONCOHERENT + select IRQ_MIPS_CPU + select MIPS_CPU_SCACHE + select MIPS_GIC + select MIPS_L1_CACHE_SHIFT_5 + select NO_EXCEPT_FILL + select SMP_UP if SMP + select SYS_HAS_CPU_MIPS32_R2 + select SYS_SUPPORTS_32BIT_KERNEL + select SYS_SUPPORTS_LITTLE_ENDIAN + select SYS_SUPPORTS_MIPS16 + select SYS_SUPPORTS_MIPS_CPS + select SYS_SUPPORTS_MULTITHREADING + select USE_OF + help + Select this to build a kernel which supports SoCs from Siflower + with MIPS InterAptiv cores, like Siflower SF19A2890. + config SNI_RM bool "SNI RM200/300/400" select ARC_MEMORY diff --git a/arch/mips/generic/Platform b/arch/mips/generic/Platform index 0c03623f3897..c09a8484db9b 100644 --- a/arch/mips/generic/Platform +++ b/arch/mips/generic/Platform @@ -10,6 +10,7 @@ # Note: order matters, keep the asm/mach-generic include last. cflags-$(CONFIG_MACH_INGENIC_SOC) += -I$(srctree)/arch/mips/include/asm/mach-ingenic +cflags-$(CONFIG_MACH_SIFLOWER_MIPS) += -I$(srctree)/arch/mips/include/asm/mach-siflower cflags-$(CONFIG_MIPS_GENERIC) += -I$(srctree)/arch/mips/include/asm/mach-generic load-$(CONFIG_MIPS_GENERIC) += 0xffffffff80100000 diff --git a/arch/mips/include/asm/mach-siflower/kmalloc.h b/arch/mips/include/asm/mach-siflower/kmalloc.h new file mode 100644 index 000000000000..d0b270e2ec64 --- /dev/null +++ b/arch/mips/include/asm/mach-siflower/kmalloc.h @@ -0,0 +1,9 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef __ASM_MACH_SIFLOWER_KMALLOC_H +#define __ASM_MACH_SIFLOWER_KMALLOC_H + +#ifdef CONFIG_DMA_NONCOHERENT +#define ARCH_DMA_MINALIGN 32 +#endif + +#endif /* __ASM_MACH_SIFLOWER_KMALLOC_H */
Siflower MIPS SoCs like SF19A2890 uses dual-core MIPS InterAptiv processor, built-in GMAC, USB, dual-band WiFi and various other peripherals. Notably, it uses some ARM PLxxx peripherals, and ARM_AMBA is selected for the drivers. Most devices on the market with this chip come with 64M or less DRAM. A kmalloc.h with malloc alignment override is added to conserve memory, and a MACH_SIFLOWER_MIPS is created with reduced features instead of using the generic kernel. Signed-off-by: Chuanhong Guo <gch981213@gmail.com> --- arch/mips/Kconfig | 30 +++++++++++++++++++ arch/mips/generic/Platform | 1 + arch/mips/include/asm/mach-siflower/kmalloc.h | 9 ++++++ 3 files changed, 40 insertions(+) create mode 100644 arch/mips/include/asm/mach-siflower/kmalloc.h