| // Copyright 2016 The Fuchsia Authors |
| // |
| // Use of this source code is governed by a MIT-style |
| // license that can be found in the LICENSE file or at |
| // https://opensource.org/licenses/MIT |
| |
| #include <err.h> |
| #include <platform.h> |
| #include <stdint.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <trace.h> |
| |
| #include <dev/interrupt.h> |
| #include <dev/udisplay.h> |
| #include <vm/vm.h> |
| #include <vm/vm_object_paged.h> |
| #include <vm/vm_object_physical.h> |
| #include <lib/user_copy/user_ptr.h> |
| #include <object/handle_owner.h> |
| #include <object/handles.h> |
| #include <object/interrupt_dispatcher.h> |
| #include <object/interrupt_event_dispatcher.h> |
| #include <object/process_dispatcher.h> |
| #include <object/resources.h> |
| #include <object/vm_object_dispatcher.h> |
| |
| #if ARCH_X86 |
| #include <platform/pc/bootloader.h> |
| #endif |
| |
| #include <zircon/syscalls/pci.h> |
| |
| #include "syscalls_priv.h" |
| |
| #define LOCAL_TRACE 0 |
| |
| static_assert(ZX_CACHE_POLICY_CACHED == ARCH_MMU_FLAG_CACHED, |
| "Cache policy constant mismatch - CACHED"); |
| static_assert(ZX_CACHE_POLICY_UNCACHED == ARCH_MMU_FLAG_UNCACHED, |
| "Cache policy constant mismatch - UNCACHED"); |
| static_assert(ZX_CACHE_POLICY_UNCACHED_DEVICE == ARCH_MMU_FLAG_UNCACHED_DEVICE, |
| "Cache policy constant mismatch - UNCACHED_DEVICE"); |
| static_assert(ZX_CACHE_POLICY_WRITE_COMBINING == ARCH_MMU_FLAG_WRITE_COMBINING, |
| "Cache policy constant mismatch - WRITE_COMBINING"); |
| |
| zx_status_t sys_interrupt_create(zx_handle_t hrsrc, uint32_t vector, uint32_t options, |
| user_ptr<zx_handle_t> out_handle) { |
| LTRACEF("vector %u options 0x%x\n", vector, options); |
| |
| zx_status_t status; |
| if ((status = validate_resource_irq(hrsrc, vector)) < 0) { |
| return status; |
| } |
| |
| fbl::RefPtr<Dispatcher> dispatcher; |
| zx_rights_t rights; |
| zx_status_t result = InterruptEventDispatcher::Create(vector, options, &dispatcher, &rights); |
| if (result != ZX_OK) |
| return result; |
| |
| HandleOwner handle(MakeHandle(fbl::move(dispatcher), rights)); |
| |
| auto up = ProcessDispatcher::GetCurrent(); |
| zx_handle_t hv = up->MapHandleToValue(handle); |
| |
| if (out_handle.copy_to_user(hv) != ZX_OK) { |
| return ZX_ERR_INVALID_ARGS; |
| } |
| |
| up->AddHandle(fbl::move(handle)); |
| return ZX_OK; |
| } |
| |
| zx_status_t sys_interrupt_complete(zx_handle_t handle_value) { |
| LTRACEF("handle %x\n", handle_value); |
| |
| auto up = ProcessDispatcher::GetCurrent(); |
| fbl::RefPtr<InterruptDispatcher> interrupt; |
| zx_status_t status = up->GetDispatcher(handle_value, &interrupt); |
| if (status != ZX_OK) |
| return status; |
| |
| return interrupt->InterruptComplete(); |
| } |
| |
| zx_status_t sys_interrupt_wait(zx_handle_t handle_value) { |
| LTRACEF("handle %x\n", handle_value); |
| |
| auto up = ProcessDispatcher::GetCurrent(); |
| fbl::RefPtr<InterruptDispatcher> interrupt; |
| zx_status_t status = up->GetDispatcher(handle_value, &interrupt); |
| if (status != ZX_OK) |
| return status; |
| |
| return interrupt->WaitForInterrupt(); |
| } |
| |
| zx_status_t sys_interrupt_signal(zx_handle_t handle_value) { |
| LTRACEF("handle %x\n", handle_value); |
| |
| auto up = ProcessDispatcher::GetCurrent(); |
| fbl::RefPtr<InterruptDispatcher> interrupt; |
| zx_status_t status = up->GetDispatcher(handle_value, &interrupt); |
| if (status != ZX_OK) |
| return status; |
| |
| return interrupt->UserSignal(); |
| } |
| |
| zx_status_t sys_vmo_create_contiguous(zx_handle_t hrsrc, size_t size, |
| uint32_t alignment_log2, |
| user_ptr<zx_handle_t> _out) { |
| LTRACEF("size 0x%zu\n", size); |
| |
| if (size == 0) return ZX_ERR_INVALID_ARGS; |
| if (alignment_log2 == 0) |
| alignment_log2 = PAGE_SIZE_SHIFT; |
| // catch obviously wrong values |
| if (alignment_log2 < PAGE_SIZE_SHIFT || |
| alignment_log2 >= (8 * sizeof(uint64_t))) |
| return ZX_ERR_INVALID_ARGS; |
| |
| // TODO(ZX-971): finer grained validation |
| zx_status_t status; |
| if ((status = validate_resource(hrsrc, ZX_RSRC_KIND_ROOT)) < 0) { |
| return status; |
| } |
| |
| size = ROUNDUP_PAGE_SIZE(size); |
| // create a vm object |
| fbl::RefPtr<VmObject> vmo; |
| status = VmObjectPaged::Create(PMM_ALLOC_FLAG_ANY, size, &vmo); |
| if (status != ZX_OK) |
| return status; |
| |
| // always immediately commit memory to the object |
| uint64_t committed; |
| // CommitRangeContiguous takes a uint8_t for the alignment |
| auto align_log2_arg = static_cast<uint8_t>(alignment_log2); |
| status = vmo->CommitRangeContiguous(0, size, &committed, align_log2_arg); |
| if (status < 0 || (size_t)committed < size) { |
| LTRACEF("failed to allocate enough pages (asked for %zu, got %zu)\n", size / PAGE_SIZE, |
| (size_t)committed / PAGE_SIZE); |
| return ZX_ERR_NO_MEMORY; |
| } |
| |
| // create a Vm Object dispatcher |
| fbl::RefPtr<Dispatcher> dispatcher; |
| zx_rights_t rights; |
| zx_status_t result = VmObjectDispatcher::Create(fbl::move(vmo), &dispatcher, &rights); |
| if (result != ZX_OK) |
| return result; |
| |
| // create a handle and attach the dispatcher to it |
| HandleOwner handle(MakeHandle(fbl::move(dispatcher), rights)); |
| if (!handle) |
| return ZX_ERR_NO_MEMORY; |
| |
| auto up = ProcessDispatcher::GetCurrent(); |
| |
| if (_out.copy_to_user(up->MapHandleToValue(handle)) != ZX_OK) |
| return ZX_ERR_INVALID_ARGS; |
| |
| up->AddHandle(fbl::move(handle)); |
| return ZX_OK; |
| } |
| |
| zx_status_t sys_vmo_create_physical(zx_handle_t hrsrc, uintptr_t paddr, size_t size, |
| user_ptr<zx_handle_t> _out) { |
| LTRACEF("size 0x%zu\n", size); |
| |
| // TODO: attempting to create a physical VMO that points to memory should be an error |
| |
| zx_status_t status; |
| if ((status = validate_resource_mmio(hrsrc, paddr, size)) < 0) { |
| return status; |
| } |
| |
| size = ROUNDUP_PAGE_SIZE(size); |
| |
| // create a vm object |
| fbl::RefPtr<VmObject> vmo; |
| zx_status_t result = VmObjectPhysical::Create(paddr, size, &vmo); |
| if (result != ZX_OK) { |
| return result; |
| } |
| |
| // create a Vm Object dispatcher |
| fbl::RefPtr<Dispatcher> dispatcher; |
| zx_rights_t rights; |
| result = VmObjectDispatcher::Create(fbl::move(vmo), &dispatcher, &rights); |
| if (result != ZX_OK) |
| return result; |
| |
| // create a handle and attach the dispatcher to it |
| HandleOwner handle(MakeHandle(fbl::move(dispatcher), rights)); |
| if (!handle) |
| return ZX_ERR_NO_MEMORY; |
| |
| auto up = ProcessDispatcher::GetCurrent(); |
| |
| if (_out.copy_to_user(up->MapHandleToValue(handle)) != ZX_OK) |
| return ZX_ERR_INVALID_ARGS; |
| |
| up->AddHandle(fbl::move(handle)); |
| return ZX_OK; |
| } |
| |
| zx_status_t sys_bootloader_fb_get_info(user_ptr<uint32_t> format, user_ptr<uint32_t> width, user_ptr<uint32_t> height, user_ptr<uint32_t> stride) { |
| #if ARCH_X86 |
| if (!bootloader.fb.base || |
| format.copy_to_user(bootloader.fb.format) || |
| width.copy_to_user(bootloader.fb.width) || |
| height.copy_to_user(bootloader.fb.height) || |
| stride.copy_to_user(bootloader.fb.stride)) { |
| return ZX_ERR_INVALID_ARGS; |
| } else { |
| return ZX_OK; |
| } |
| #else |
| return ZX_ERR_NOT_SUPPORTED; |
| #endif |
| } |
| |
| zx_status_t sys_set_framebuffer(zx_handle_t hrsrc, user_ptr<void> vaddr, uint32_t len, uint32_t format, uint32_t width, uint32_t height, uint32_t stride) { |
| // TODO(ZX-971): finer grained validation |
| zx_status_t status; |
| if ((status = validate_resource(hrsrc, ZX_RSRC_KIND_ROOT)) < 0) { |
| return status; |
| } |
| |
| intptr_t paddr = vaddr_to_paddr(vaddr.get()); |
| udisplay_set_framebuffer(paddr, len); |
| |
| struct display_info di; |
| memset(&di, 0, sizeof(struct display_info)); |
| di.format = format; |
| di.width = width; |
| di.height = height; |
| di.stride = stride; |
| di.flags = DISPLAY_FLAG_HW_FRAMEBUFFER; |
| udisplay_set_display_info(&di); |
| |
| return ZX_OK; |
| } |
| |
| zx_status_t sys_set_framebuffer_vmo(zx_handle_t hrsrc, zx_handle_t vmo_handle, uint32_t len, uint32_t format, uint32_t width, uint32_t height, uint32_t stride) { |
| zx_status_t status; |
| if ((status = validate_resource(hrsrc, ZX_RSRC_KIND_ROOT)) < 0) |
| return status; |
| |
| auto up = ProcessDispatcher::GetCurrent(); |
| |
| // lookup the dispatcher from handle |
| fbl::RefPtr<VmObjectDispatcher> vmo; |
| status = up->GetDispatcher(vmo_handle, &vmo); |
| if (status != ZX_OK) |
| return status; |
| |
| status = udisplay_set_framebuffer_vmo(vmo->vmo()); |
| if (status != ZX_OK) |
| return status; |
| |
| struct display_info di; |
| memset(&di, 0, sizeof(struct display_info)); |
| di.format = format; |
| di.width = width; |
| di.height = height; |
| di.stride = stride; |
| di.flags = DISPLAY_FLAG_HW_FRAMEBUFFER; |
| udisplay_set_display_info(&di); |
| |
| return ZX_OK; |
| } |
| |
| #if ARCH_X86 |
| #include <arch/x86/descriptor.h> |
| #include <arch/x86/ioport.h> |
| |
| zx_status_t sys_mmap_device_io(zx_handle_t hrsrc, uint32_t io_addr, uint32_t len) { |
| // TODO(ZX-971): finer grained validation |
| zx_status_t status; |
| if ((status = validate_resource(hrsrc, ZX_RSRC_KIND_ROOT)) < 0) { |
| return status; |
| } |
| |
| LTRACEF("addr 0x%x len 0x%x\n", io_addr, len); |
| |
| return IoBitmap::GetCurrent().SetIoBitmap(io_addr, len, 1); |
| } |
| #else |
| zx_status_t sys_mmap_device_io(zx_handle_t hrsrc, uint32_t io_addr, uint32_t len) { |
| // doesn't make sense on non-x86 |
| return ZX_ERR_NOT_SUPPORTED; |
| } |
| #endif |
| |
| uint64_t sys_acpi_uefi_rsdp(zx_handle_t hrsrc) { |
| // TODO(ZX-971): finer grained validation |
| zx_status_t status; |
| if ((status = validate_resource(hrsrc, ZX_RSRC_KIND_ROOT)) < 0) { |
| return status; |
| } |
| #if ARCH_X86 |
| return bootloader.acpi_rsdp; |
| #endif |
| return 0; |
| } |
| |
| zx_status_t sys_acpi_cache_flush(zx_handle_t hrsrc) { |
| // TODO(ZX-971): finer grained validation |
| zx_status_t status; |
| if ((status = validate_resource(hrsrc, ZX_RSRC_KIND_ROOT)) < 0) { |
| return status; |
| } |
| // TODO(teisenbe): This should be restricted to when interrupts are |
| // disabled, but we haven't added support for letting the ACPI process |
| // disable interrupts yet. It only uses this for S-state transitions |
| // like poweroff and (more importantly) sleep. |
| #if ARCH_X86 |
| __asm__ volatile ("wbinvd"); |
| return ZX_OK; |
| #else |
| return ZX_ERR_NOT_SUPPORTED; |
| #endif |
| } |