X-Git-Url: http://review.tizen.org/git/?a=blobdiff_plain;f=arch%2Fsandbox%2Fcpu%2Fcpu.c;h=ff7430393ffe80cc31e67e741b9002af46978869;hb=1eb69ae498567bb0b62ee554647204e8245cdacc;hp=eefed2ebd9617c41558764111531d2288b6354d5;hpb=c87dc38d8f860710f5f624d9dae6cefded285b8d;p=platform%2Fkernel%2Fu-boot.git diff --git a/arch/sandbox/cpu/cpu.c b/arch/sandbox/cpu/cpu.c index eefed2e..ff74303 100644 --- a/arch/sandbox/cpu/cpu.c +++ b/arch/sandbox/cpu/cpu.c @@ -1,14 +1,16 @@ +// SPDX-License-Identifier: GPL-2.0+ /* * Copyright (c) 2011 The Chromium OS Authors. - * SPDX-License-Identifier: GPL-2.0+ */ -#define DEBUG + #include +#include #include #include -#include +#include #include #include +#include #include #include @@ -56,6 +58,106 @@ int cleanup_before_linux_select(int flags) return 0; } +/** + * is_in_sandbox_mem() - Checks if a pointer is within sandbox's emulated DRAM + * + * This provides a way to check if a pointer is owned by sandbox (and is within + * its RAM) or not. Sometimes pointers come from a test which conceptually runs + * output sandbox, potentially with direct access to the C-library malloc() + * function, or the sandbox stack (which is not actually within the emulated + * DRAM. + * + * Such pointers obviously cannot be mapped into sandbox's DRAM, so we must + * detect them an process them separately, by recording a mapping to a tag, + * which we can use to map back to the pointer later. + * + * @ptr: Pointer to check + * @return true if this is within sandbox emulated DRAM, false if not + */ +static bool is_in_sandbox_mem(const void *ptr) +{ + return (const uint8_t *)ptr >= gd->arch.ram_buf && + (const uint8_t *)ptr < gd->arch.ram_buf + gd->ram_size; +} + +/** + * phys_to_virt() - Converts a sandbox RAM address to a pointer + * + * Sandbox uses U-Boot addresses from 0 to the size of DRAM. These index into + * the emulated DRAM buffer used by sandbox. This function converts such an + * address to a pointer into this buffer, which can be used to access the + * memory. + * + * If the address is outside this range, it is assumed to be a tag + */ +void *phys_to_virt(phys_addr_t paddr) +{ + struct sandbox_mapmem_entry *mentry; + struct sandbox_state *state; + + /* If the address is within emulated DRAM, calculate the value */ + if (paddr < gd->ram_size) + return (void *)(gd->arch.ram_buf + paddr); + + /* + * Otherwise search out list of tags for the correct pointer previously + * created by map_to_sysmem() + */ + state = state_get_current(); + list_for_each_entry(mentry, &state->mapmem_head, sibling_node) { + if (mentry->tag == paddr) { + debug("%s: Used map from %lx to %p\n", __func__, + (ulong)paddr, mentry->ptr); + return mentry->ptr; + } + } + + printf("%s: Cannot map sandbox address %lx (SDRAM from 0 to %lx)\n", + __func__, (ulong)paddr, (ulong)gd->ram_size); + os_abort(); + + /* Not reached */ + return NULL; +} + +struct sandbox_mapmem_entry *find_tag(const void *ptr) +{ + struct sandbox_mapmem_entry *mentry; + struct sandbox_state *state = state_get_current(); + + list_for_each_entry(mentry, &state->mapmem_head, sibling_node) { + if (mentry->ptr == ptr) { + debug("%s: Used map from %p to %lx\n", __func__, ptr, + mentry->tag); + return mentry; + } + } + return NULL; +} + +phys_addr_t virt_to_phys(void *ptr) +{ + struct sandbox_mapmem_entry *mentry; + + /* + * If it is in emulated RAM, don't bother looking for a tag. Just + * calculate the pointer using the provides offset into the RAM buffer. + */ + if (is_in_sandbox_mem(ptr)) + return (phys_addr_t)((uint8_t *)ptr - gd->arch.ram_buf); + + mentry = find_tag(ptr); + if (!mentry) { + /* Abort so that gdb can be used here */ + printf("%s: Cannot map sandbox address %p (SDRAM from 0 to %lx)\n", + __func__, ptr, (ulong)gd->ram_size); + os_abort(); + } + debug("%s: Used map from %p to %lx\n", __func__, ptr, mentry->tag); + + return mentry->tag; +} + void *map_physmem(phys_addr_t paddr, unsigned long len, unsigned long flags) { #if defined(CONFIG_PCI) && !defined(CONFIG_SPL_BUILD) @@ -66,37 +168,125 @@ void *map_physmem(phys_addr_t paddr, unsigned long len, unsigned long flags) if (enable_pci_map && !pci_map_physmem(paddr, &len, &map_dev, &ptr)) { if (plen != len) { printf("%s: Warning: partial map at %x, wanted %lx, got %lx\n", - __func__, paddr, len, plen); + __func__, (uint)paddr, len, plen); } map_len = len; return ptr; } #endif - return (void *)(gd->arch.ram_buf + paddr); + return phys_to_virt(paddr); } -void unmap_physmem(const void *vaddr, unsigned long flags) +void unmap_physmem(const void *ptr, unsigned long flags) { #ifdef CONFIG_PCI if (map_dev) { - pci_unmap_physmem(vaddr, map_len, map_dev); + pci_unmap_physmem(ptr, map_len, map_dev); map_dev = NULL; } #endif } +phys_addr_t map_to_sysmem(const void *ptr) +{ + struct sandbox_mapmem_entry *mentry; + + /* + * If it is in emulated RAM, don't bother creating a tag. Just return + * the offset into the RAM buffer. + */ + if (is_in_sandbox_mem(ptr)) + return (u8 *)ptr - gd->arch.ram_buf; + + /* + * See if there is an existing tag with this pointer. If not, set up a + * new one. + */ + mentry = find_tag(ptr); + if (!mentry) { + struct sandbox_state *state = state_get_current(); + + mentry = malloc(sizeof(*mentry)); + if (!mentry) { + printf("%s: Error: Out of memory\n", __func__); + os_exit(ENOMEM); + } + mentry->tag = state->next_tag++; + mentry->ptr = (void *)ptr; + list_add_tail(&mentry->sibling_node, &state->mapmem_head); + debug("%s: Added map from %p to %lx\n", __func__, ptr, + (ulong)mentry->tag); + } + + /* + * Return the tag as the address to use. A later call to map_sysmem() + * will return ptr + */ + return mentry->tag; +} + +unsigned int sandbox_read(const void *addr, enum sandboxio_size_t size) +{ + struct sandbox_state *state = state_get_current(); + + if (!state->allow_memio) + return 0; + + switch (size) { + case SB_SIZE_8: + return *(u8 *)addr; + case SB_SIZE_16: + return *(u16 *)addr; + case SB_SIZE_32: + return *(u32 *)addr; + case SB_SIZE_64: + return *(u64 *)addr; + } + + return 0; +} + +void sandbox_write(void *addr, unsigned int val, enum sandboxio_size_t size) +{ + struct sandbox_state *state = state_get_current(); + + if (!state->allow_memio) + return; + + switch (size) { + case SB_SIZE_8: + *(u8 *)addr = val; + break; + case SB_SIZE_16: + *(u16 *)addr = val; + break; + case SB_SIZE_32: + *(u32 *)addr = val; + break; + case SB_SIZE_64: + *(u64 *)addr = val; + break; + } +} + +void sandbox_set_enable_memio(bool enable) +{ + struct sandbox_state *state = state_get_current(); + + state->allow_memio = enable; +} + void sandbox_set_enable_pci_map(int enable) { enable_pci_map = enable; } -phys_addr_t map_to_sysmem(const void *ptr) +void flush_dcache_range(unsigned long start, unsigned long stop) { - return (u8 *)ptr - gd->arch.ram_buf; } -void flush_dcache_range(unsigned long start, unsigned long stop) +void invalidate_dcache_range(unsigned long start, unsigned long stop) { }