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https://github.com/Fennix-Project/Drivers.git
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Update drivers
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182
library/base.c
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182
library/base.c
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/*
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This file is part of Fennix Drivers.
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Fennix Drivers is free software: you can redistribute it and/or
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modify it under the terms of the GNU General Public License as
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published by the Free Software Foundation, either version 3 of
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the License, or (at your option) any later version.
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Fennix Drivers is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Fennix Drivers. If not, see <https://www.gnu.org/licenses/>.
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*/
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#include <base.h>
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#include <driver.h>
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#include <errno.h>
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__driverAPI *API = NULL;
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int RegisterInterruptHandler(uint8_t IRQ, void *Handler)
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{
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if (Handler == NULL)
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return -EINVAL;
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return API->RegisterInterruptHandler(API->MajorID,
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IRQ,
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Handler);
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}
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int OverrideInterruptHandler(uint8_t IRQ, void *Handler)
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{
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if (Handler == NULL)
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return -EINVAL;
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return API->OverrideInterruptHandler(API->MajorID,
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IRQ,
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Handler);
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}
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int UnregisterInterruptHandler(uint8_t IRQ, void *Handler)
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{
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if (Handler == NULL)
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return -EINVAL;
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return API->UnregisterInterruptHandler(API->MajorID,
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IRQ,
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Handler);
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}
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int UnregisterAllInterruptHandlers(void *Handler)
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{
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if (Handler == NULL)
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return -EINVAL;
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return API->UnregisterAllInterruptHandlers(API->MajorID,
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Handler);
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}
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void *AllocateMemory(size_t Pages)
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{
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if (Pages == 0)
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return NULL;
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return API->RequestPages(API->MajorID,
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Pages);
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}
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void FreeMemory(void *Pointer, size_t Pages)
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{
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if (Pointer == NULL || Pages == 0)
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return;
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API->FreePages(API->MajorID,
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Pointer,
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Pages);
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}
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void AppendMapFlag(void *Address, PageMapFlags Flag)
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{
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API->AppendMapFlag(API->MajorID,
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Address,
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Flag);
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}
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void RemoveMapFlag(void *Address, PageMapFlags Flag)
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{
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API->RemoveMapFlag(API->MajorID,
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Address,
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Flag);
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}
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void MapPages(void *PhysicalAddress, void *VirtualAddress, size_t Pages, uint32_t Flags)
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{
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API->MapPages(API->MajorID,
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PhysicalAddress,
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VirtualAddress,
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Pages,
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Flags);
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}
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void UnmapPages(void *VirtualAddress, size_t Pages)
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{
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API->UnmapPages(API->MajorID,
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VirtualAddress,
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Pages);
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}
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void KPrint(const char *Format, ...)
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{
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va_list Args;
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va_start(Args, Format);
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API->KPrint(API->MajorID,
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Format,
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Args);
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va_end(Args);
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}
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void Log(const char *Format, ...)
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{
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va_list Args;
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va_start(Args, Format);
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API->KernelLog(API->MajorID,
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Format,
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Args);
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va_end(Args);
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}
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CriticalState EnterCriticalSection()
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{
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CriticalState cs;
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#if defined(__i386__) || defined(__x86_64__)
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uintptr_t Flags;
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#if defined(__x86_64__)
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asmv("pushfq");
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asmv("popq %0"
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: "=r"(Flags));
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#else
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asmv("pushfl");
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asmv("popl %0"
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: "=r"(Flags));
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#endif
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cs = Flags & (1 << 9);
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asmv("cli");
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#elif defined(__arm__) || defined(__aarch64__)
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uintptr_t Flags;
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asmv("mrs %0, cpsr"
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: "=r"(Flags));
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cs = Flags & (1 << 7);
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asmv("cpsid i");
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#endif
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return cs;
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}
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void LeaveCriticalSection(CriticalState PreviousState)
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{
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#if defined(__i386__) || defined(__x86_64__)
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if (PreviousState)
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asmv("sti");
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#elif defined(__arm__) || defined(__aarch64__)
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if (PreviousState)
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asmv("cpsie i");
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#endif
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}
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