kernelite/utils_8h_source.html

#ifndef UTILS_UTILS_H

#define UTILS_UTILS_H


#include <stdbool.h>

#include <stdint.h>


typedef union mpidr_el1_t {

    uint64_t raw;

    struct __attribute__((packed)) {

        uint32_t aff0 : 8;


        uint32_t aff1 : 8;


        uint32_t aff2 : 8;


        bool mt : 1;


        uint32_t res0_29_25 : 5;


        bool uniprocessor : 1;


        uint32_t res1 : 1;


        uint32_t aff3 : 8;


        uint32_t res0_63_40 : 24;

    };

} mpidr_el1_t;


_Static_assert(sizeof(mpidr_el1_t) == 8, "MPIDR_EL1 must be 64 bits");


void print_kernelite_logo(void);


uint32_t get_core_id(void);


void print_current_el(void);


bool setup_page_allocator(const void *fdt_addr);


#endif /* UTILS_UTILS_H */

mpidr_el1_t
AArch64 Multiprocessor Affinity Register (MPIDR_EL1, read-only).
Definition utils.h:33

mpidr_el1_t::uniprocessor
bool uniprocessor
[30] U: Uniprocessor flag. Set to 1 if the implementation is a single PE with no affinity structure.
Definition utils.h:58

mpidr_el1_t::res0_29_25
uint32_t res0_29_25
[29:25] Reserved.
Definition utils.h:54

mpidr_el1_t::aff1
uint32_t aff1
[15:8] Aff1: Cluster ID. Groups of cores sharing L2 cache or a cluster block typically share the same...
Definition utils.h:44

mpidr_el1_t::aff3
uint32_t aff3
[39:32] Aff3: Highest-level affinity (multi-socket or NUMA node). Zero on most embedded/server implem...
Definition utils.h:65

mpidr_el1_t::res0_63_40
uint32_t res0_63_40
[63:40] RES1 / implementation defined. Mask before use.
Definition utils.h:69

mpidr_el1_t::aff2
uint32_t aff2
[23:16] Aff2: Higher-level cluster or socket ID.
Definition utils.h:47

mpidr_el1_t::aff0
uint32_t aff0
[7:0] Aff0: Thread/core ID within a cluster. On most simple systems this is the linear core number....
Definition utils.h:40

mpidr_el1_t::raw
uint64_t raw
Raw 64-bit register value.
Definition utils.h:35

mpidr_el1_t::mt
bool mt
[24] MT: Multithreading. When 1, Aff0 identifies a thread within a core rather than a core within a c...
Definition utils.h:51

mpidr_el1_t::res1
uint32_t res1
[31] RES1: Always reads as 1 at EL1.
Definition utils.h:61

print_current_el
void print_current_el(void)
Prints the current exeception level.
Definition utils.c:196

setup_page_allocator
bool setup_page_allocator(const void *fdt_addr)
Set up the global page allocator.
Definition utils.c:106

print_kernelite_logo
void print_kernelite_logo(void)
Prints the Kernelite ASCII art logo and banner to the console.
Definition utils.c:144

get_core_id
uint32_t get_core_id(void)
Gets the core id.
Definition utils.c:189