/* SPDX-License-Identifier: GPL-2.0-only */ /* * linux/arch/unicore32/include/mach/memory.h * * Code specific to PKUnity SoC and UniCore ISA * * Copyright (C) 2001-2010 GUAN Xue-tao */ #ifndef __MACH_PUV3_MEMORY_H__ #define __MACH_PUV3_MEMORY_H__ #include <mach/hardware.h> /* Physical DRAM offset. */ #define PHYS_OFFSET UL(0x00000000) /* The base address of exception vectors. */ #define VECTORS_BASE UL(0xffff0000) /* The base address of kuser area. */ #define KUSER_BASE UL(0x80000000) #ifdef __ASSEMBLY__ /* The byte offset of the kernel image in RAM from the start of RAM. */ #define KERNEL_IMAGE_START 0x00408000 #endif #if !defined(__ASSEMBLY__) && defined(CONFIG_PCI) void puv3_pci_adjust_zones(unsigned long *max_zone_pfn); #define arch_adjust_zones(max_zone_pfn) \ puv3_pci_adjust_zones(max_zone_pfn) #endif /* * PCI controller in PKUnity-3 masks highest 5-bit for upstream channel, * so we must limit the DMA allocation within 128M physical memory for * supporting PCI devices. */ #define PCI_DMA_THRESHOLD (PHYS_OFFSET + SZ_128M - 1) #define is_pcibus_device(dev) (dev && \ (strncmp(dev->bus->name, "pci", 3) == 0)) #define __virt_to_pcibus(x) (__virt_to_phys((x) + PKUNITY_PCIAHB_BASE)) #define __pcibus_to_virt(x) (__phys_to_virt(x) - PKUNITY_PCIAHB_BASE) /* kuser area */ #define KUSER_VECPAGE_BASE (KUSER_BASE + UL(0x3fff0000)) /* kuser_vecpage (0xbfff0000) is ro, and vectors page (0xffff0000) is rw */ #define kuser_vecpage_to_vectors(x) ((x) - (KUSER_VECPAGE_BASE) \ + (VECTORS_BASE)) #endif