C++ (Cpp) mips_cpc_default_phys_base示例

示例#1

文件： mips-cpc.c 项目： 0x000000FF/edison-linux

phys_addr_t __weak mips_cpc_phys_base(void)
{
	u32 cpc_base;

	if (!mips_cm_present())
		return 0;

	if (!(read_gcr_cpc_status() & CM_GCR_CPC_STATUS_EX_MSK))
		return 0;

	/* If the CPC is already enabled, leave it so */
	cpc_base = read_gcr_cpc_base();
	if (cpc_base & CM_GCR_CPC_BASE_CPCEN_MSK)
		return cpc_base & CM_GCR_CPC_BASE_CPCBASE_MSK;

	/* Otherwise, give it the default address & enable it */
	cpc_base = mips_cpc_default_phys_base();
	write_gcr_cpc_base(cpc_base | CM_GCR_CPC_BASE_CPCEN_MSK);
	return cpc_base;
}

示例#2

文件： mips-cpc.c 项目： EMFPGA/linux_media

/**
 * mips_cpc_phys_base - retrieve the physical base address of the CPC
 *
 * This function returns the physical base address of the Cluster Power
 * Controller memory mapped registers, or 0 if no Cluster Power Controller
 * is present.
 */
static phys_addr_t mips_cpc_phys_base(void)
{
	unsigned long cpc_base;

	if (!mips_cm_present())
		return 0;

	if (!(read_gcr_cpc_status() & CM_GCR_CPC_STATUS_EX))
		return 0;

	/* If the CPC is already enabled, leave it so */
	cpc_base = read_gcr_cpc_base();
	if (cpc_base & CM_GCR_CPC_BASE_CPCEN)
		return cpc_base & CM_GCR_CPC_BASE_CPCBASE;

	/* Otherwise, use the default address */
	cpc_base = mips_cpc_default_phys_base();
	if (!cpc_base)
		return cpc_base;

	/* Enable the CPC, mapped at the default address */
	write_gcr_cpc_base(cpc_base | CM_GCR_CPC_BASE_CPCEN);
	return cpc_base;
}