Module asm 

Wrapper functions for assembly instructions.

Functions

clean_dcache_range_to_pou

Cleans a data cache range to the point of unification.

dcache_line_size_from_ctr

Reads the data cache line size from CTR_EL0 and returns it in bytes.

disable_irqs

Makes the current CPU to ignore interrupts.

enable_fp

Enable FP/SIMD instructions by setting the FPEN field in CPACR_EL1.

enable_irqs

Allows the current CPU to respond to interrupts.

flush_dcache_line

Cleans and invalidates the data cache line that covers the given address.

flush_icache_all

Flushes the entire instruction cache.

flush_tlb

Flushes the TLB.

halt

Halt the current CPU.

icache_line_size_from_ctr

Reads the instruction cache line size from CTR_EL0 and returns it in bytes.

irqs_enabled

Returns whether the current CPU is allowed to respond to interrupts.

read_kernel_page_table

Reads the current page table root register for kernel space (TTBR1_EL1).

read_thread_pointer

Reads the thread pointer of the current CPU (TPIDR_EL0).

read_user_page_table

Reads the current page table root register for user space (TTBR0_EL1).

user_copy^⚠uspace

Copies data from source to destination, where addresses may be in user space. Equivalent to memcpy.

wait_for_irqs

Relaxes the current CPU and waits for interrupts.

write_exception_vector_base^⚠

Writes exception vector base address register (VBAR_EL1).

write_kernel_page_table^⚠

Writes the register to update the current page table root for kernel space (TTBR1_EL1).

write_thread_pointer^⚠

Writes the thread pointer of the current CPU (TPIDR_EL0).

write_user_page_table^⚠

Writes the register to update the current page table root for user space (TTBR1_EL0). When the “arm-el2” feature is enabled, for user-mode programs, virtualization is completely transparent to them, so there is no need to modify