powerpc/mpc85xx: Add DSP side awareness for Freescale Heterogeneous SoCs

The code provides framework for heterogeneous multicore chips based on StarCore
and Power Architecture which are chasis-2 compliant, like B4860 and B4420

It will make u-boot recognize all non-ppc cores and peripherals like
SC3900/DSP CPUs, MAPLE, CPRI and print their configuration in u-boot logs.
Example boot logs of B4860QDS:

U-Boot 2015.01-00232-geef6e36-dirty (Jan 19 2015 - 11:58:45)

CPU0:  B4860E, Version: 2.2, (0x86880022)
Core:  e6500, Version: 2.0, (0x80400120)
Clock Configuration:
       CPU0:1600 MHz, CPU1:1600 MHz, CPU2:1600 MHz, CPU3:1600 MHz,
       DSP CPU0:1200 MHz, DSP CPU1:1200 MHz, DSP CPU2:1200 MHz, DSP CPU3:1200 MHz,
       DSP CPU4:1200 MHz, DSP CPU5:1200 MHz,
       CCB:666.667 MHz,
       DDR:933.333 MHz (1866.667 MT/s data rate) (Asynchronous), IFC:166.667 MHz
       CPRI:600  MHz
       MAPLE:600  MHz, MAPLE-ULB:800  MHz, MAPLE-eTVPE:1000 MHz
       FMAN1: 666.667 MHz
       QMAN:  333.333 MHz

Top level changes include:
(1) Top level CONFIG to identify HETEROGENUOUS clusters
(2) CONFIGS for SC3900/DSP components
(3) Global structures like "cpu_type" and "MPC85xx_SYS_INFO"
    updated for dsp cores and other components
(3) APIs to get DSP num cores and their Mask like:
        cpu_dsp_mask, cpu_num_dspcores etc same as that of PowerPC
(5) Code to fetch and print SC cores and other heterogenous
    device's frequencies
(6) README added for the same

Signed-off-by: Shaveta Leekha <shaveta@freescale.com>
Reviewed-by: York Sun <yorksun@freescale.com>

1 files changed, 28 insertions, 0 deletions

diff --git a/arch/powerpc/cpu/mpc85xx/cpu.c b/arch/powerpc/cpu/mpc85xx/cpu.c
index 3d6ec843df..ef08489aa6 100644
--- a/arch/powerpc/cpu/mpc85xx/cpu.c
+++ b/arch/powerpc/cpu/mpc85xx/cpu.c
@@ -73,6 +73,11 @@ int checkcpu (void)
 	unsigned int i, core, nr_cores = cpu_numcores();
 	u32 mask = cpu_mask();
 
+#ifdef CONFIG_HETROGENOUS_CLUSTERS
+	unsigned int j, dsp_core, dsp_numcores = cpu_num_dspcores();
+	u32 dsp_mask = cpu_dsp_mask();
+#endif
+
 	svr = get_svr();
 	major = SVR_MAJ(svr);
 	minor = SVR_MIN(svr);
@@ -166,6 +171,16 @@ int checkcpu (void)
 		printf("CPU%d:%-4s MHz, ", core,
 			strmhz(buf1, sysinfo.freq_processor[core]));
 	}
+
+#ifdef CONFIG_HETROGENOUS_CLUSTERS
+	for_each_cpu(j, dsp_core, dsp_numcores, dsp_mask) {
+		if (!(j & 3))
+			printf("\n       ");
+		printf("DSP CPU%d:%-4s MHz, ", j,
+		       strmhz(buf1, sysinfo.freq_processor_dsp[dsp_core]));
+	}
+#endif
+
 	printf("\n       CCB:%-4s MHz,", strmhz(buf1, sysinfo.freq_systembus));
 	printf("\n");
 
@@ -224,6 +239,19 @@ int checkcpu (void)
 	printf("       QE:%-4s MHz\n", strmhz(buf1, sysinfo.freq_qe));
 #endif
 
+#if defined(CONFIG_SYS_CPRI)
+	printf("       ");
+	printf("CPRI:%-4s MHz", strmhz(buf1, sysinfo.freq_cpri));
+#endif
+
+#if defined(CONFIG_SYS_MAPLE)
+	printf("\n       ");
+	printf("MAPLE:%-4s MHz, ", strmhz(buf1, sysinfo.freq_maple));
+	printf("MAPLE-ULB:%-4s MHz, ", strmhz(buf1, sysinfo.freq_maple_ulb));
+	printf("MAPLE-eTVPE:%-4s MHz\n",
+	       strmhz(buf1, sysinfo.freq_maple_etvpe));
+#endif
+
 #ifdef CONFIG_SYS_DPAA_FMAN
 	for (i = 0; i < CONFIG_SYS_NUM_FMAN; i++) {
 		printf("       FMAN%d: %s MHz\n", i + 1,