/* ------------------------------------------------------------------------*//**
* @FUNCTION mem_read
* @BRIEF read memory value at given physical address.
* @RETURNS 0 on success
* MEM_ERR_ARG
* MEM_ERR_ACCESS
* @param[in] addr: 32-bit memory physical address
* @param[in, out] val: pointer where to store read value
* @DESCRIPTION read memory value at given physical address.
* *val == 0xBEEFDEAD in case of error.
*//*------------------------------------------------------------------------ */
int mem_read(unsigned int addr, unsigned int *val)
{
int ret;
if ((void *) val == NULL) {
fprintf(stderr, "%s(): val == NULL!!!\n", __func__);
return MEM_ERR_ARG;
}
if (addr == 0) {
fprintf(stderr, "%s(): trying to read address 0!!!\n",
__func__);
return MEM_ERR_ARG;
}
if (mem_fake_access_get()) {
*val = (unsigned int) addr;
ret = 0;
} else {
ret = lmem_read(addr, val);
if (ret != 0)
ret = MEM_ERR_ACCESS;
}
if (mem_read_trace)
printf("omapconf: read 0x%08X at address 0x%08X\n", *val, addr);
return ret;
}
/* ------------------------------------------------------------------------*//**
* @FUNCTION clk_am335x_sysclk_rate_get
* @BRIEF Return the mandatory system clock speed, in MHz.
* @RETURNS > 0 system clock speed, in MHz.
* OMAPCONF_ERR_CPU
* OMAPCONF_ERR_UNEXPECTED
* @param[in] none
* @DESCRIPTION Return the mandatory system clock speed, in MHz.
*//*------------------------------------------------------------------------ */
double clk_am335x_sysclk_rate_get(void)
{
unsigned int reg_val;
static double sysclk = 0.0;
sysclk_am335x_id sysclk_id;
if (!cpu_is_am335x())
return (double) OMAPCONF_ERR_CPU;
if (sysclk > 0.0) {
dprintf("%s(): sysclk rate=%.1lfMHz\n", __func__, sysclk);
return sysclk;
}
if (!mem_fake_access_get()) {
mem_read(AM335X_STATUS, ®_val);
sysclk_id = extract_bitfield(reg_val, 22, 2);
} else {
sysclk_id = SYSCLK_AM335X_19_2_MHZ; /* AM335X EVM PoR */
}
sysclk = sysclk_am335x_rate_table[sysclk_id];
if (sysclk == 0.0) {
fprintf(stderr, "%s(): bad CONTROL_STATUS value(%d)\n",
__func__, sysclk_id);
sysclk = (double) OMAPCONF_ERR_UNEXPECTED;
} else {
dprintf("%s(): CONTROL_STATUS=0x%x, sysclk rate=%.1lfMHz\n",
__func__, sysclk_id, sysclk);
}
return sysclk;
}
/* ------------------------------------------------------------------------*//**
* @FUNCTION mem_write
* @BRIEF write memory value at given physical address.
* @RETURNS 0 on success
* MEM_ERR_ARG
* MEM_ERR_ACCESS
* @param[in] addr: 32-bit memory physical address
* @param[in] val: value to be written in memory
* @DESCRIPTION write value at given memory physical address.
*//*------------------------------------------------------------------------ */
int mem_write(unsigned int addr, unsigned int val)
{
int ret;
if (addr == 0) {
fprintf(stderr, "%s(): trying to write at address 0!!!\n",
__func__);
return MEM_ERR_ARG;
}
if (!mem_fake_access_get()) {
ret = lmem_write(addr, val);
if (ret != 0)
ret = MEM_ERR_ACCESS;
} else {
ret = 0;
}
return ret;
}
