integer.c

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#include <kernel/acpi/aml/integer.h>
 
#include <kernel/acpi/tables.h>
#include <kernel/log/log.h>
 
static uint8_t integerByteSize = 0;
 
uint64_t aml_integer_handling_init(void)
{
    dsdt_t* dsdt = (dsdt_t*)acpi_tables_lookup(DSDT_SIGNATURE, 0);
    if (dsdt == NULL)
    {
        LOG_ERR("failed to retrieve DSDT\n");
        return ERR;
    }
    integerByteSize = dsdt->header.revision < 2 ? 4 : 8; // Section 5.2.11.1
 
    LOG_INFO("using AML integer size %u bits\n", integerByteSize * 8);
    return 0;
}
 
uint8_t aml_integer_byte_size(void)
{
    return integerByteSize;
}
 
uint8_t aml_integer_bit_size(void)
{
    return integerByteSize * 8;
}
 
aml_integer_t aml_integer_ones(void)
{
    return integerByteSize == 4 ? UINT32_MAX : UINT64_MAX;
}