coreboot arm: Define function for setting cntfrq register

Define functions for setting cntfrq register in arm and arm64 arch. This allows
SoCs to set this register independently of the architecture being used.

BUG=None
BRANCH=None
TEST=Compiles successfully for nyan and rush

Original-Change-Id: I93240419b2c012eee29a408deff34a42af943a63
Original-Signed-off-by: Furquan Shaikh <furquan@google.com>
Original-Reviewed-on: https://chromium-review.googlesource.com/205580
Original-Tested-by: Furquan Shaikh <furquan@chromium.org>
Original-Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Original-Commit-Queue: Aaron Durbin <adurbin@chromium.org>
(cherry picked from commit 768463fef5d630dec915aa0b95e7724d4a6f74b6)

armv8: GPL license armv8 lib

BUG=None
BRANCH=None
TEST=Compiles successfully.

Original-Change-Id: Ibe0f09ef6704ad808cc482ffec27a4db32d7f6fd
Original-Signed-off-by: Furquan Shaikh <furquan@google.com>
Original-Reviewed-on: https://chromium-review.googlesource.com/250950
Original-Trybot-Ready: Furquan Shaikh <furquan@chromium.org>
Original-Tested-by: Furquan Shaikh <furquan@chromium.org>
Original-Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Original-Commit-Queue: Furquan Shaikh <furquan@chromium.org>
(cherry picked from commit bc115869bb0bcedbc284677ca5743b9ab40bfc7e)

Signed-off-by: Marc Jones <marc.jones@se-eng.com>
Change-Id: I298c3e76cb52f0876bce3dd4f54d875f62e9310a
Reviewed-on: http://review.coreboot.org/8468
Tested-by: build bot (Jenkins)
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Aaron Durbin <adurbin@google.com>

1 files changed, 48 insertions, 36 deletions

diff --git a/src/soc/nvidia/tegra132/clock.c b/src/soc/nvidia/tegra132/clock.c
index 5237712ef3..2da7ea1d04 100644
--- a/src/soc/nvidia/tegra132/clock.c
+++ b/src/soc/nvidia/tegra132/clock.c
@@ -20,6 +20,7 @@
 #include <soc/addressmap.h>
 #include <soc/clock.h>
 #include <stdlib.h>
+#include <arch/clock.h>
 #include "clk_rst.h"
 #include "flow.h"
 #include "maincpu.h"
@@ -180,12 +181,12 @@ int clock_get_pll_input_khz(void)
 void clock_init_arm_generic_timer(void)
 {
 	uint32_t freq = clock_get_osc_khz() * 1000;
-	// Set the cntfrq register.
-	__asm__ __volatile__("mcr p15, 0, %0, c14, c0, 0\n" :: "r"(freq));
+	/* Set the cntfrq register. */
+	set_cntfrq(freq);
 
-	// Record the system timer frequency.
+	/* Record the system timer frequency. */
 	write32(freq, &sysctr->cntfid0);
-	// Enable the system counter.
+	/* Enable the system counter. */
 	uint32_t cntcr = read32(&sysctr->cntcr);
 	cntcr |= SYSCTR_CNTCR_EN | SYSCTR_CNTCR_HDBG;
 	write32(cntcr, &sysctr->cntcr);
@@ -282,7 +283,7 @@ static void graphics_pll(void)
 	 * I don't want to find out in a few months
 	 * that it is needed.
 	 */
-	u32 scfg = (1<<28) | (1<<24) | (1<<22);
+	u32 scfg = (1 << 28) | (1 << 24) | (1 << 22);
 	writel(scfg, cfg);
 	init_pll(&clk_rst->plldp_base, &clk_rst->plldp_misc,
 		osc_table[osc].plldp, PLLDPD2_MISC_LOCK_ENABLE);
@@ -309,8 +310,9 @@ clock_display(u32 frequency)
 	 * iterate all possible values.  Note Tegra 124 supports 11 bits for n,
 	 * but our pll_fields has only 10 bits for n.
 	 *
-	 * Note values undershoot or overshoot target output frequency may not
-	 * work if the values are not in "safe" range by panel specification.
+	 * Note, values that undershoot or overshoot the target output frequency
+	 * may not work if the values are not in "safe" range by panel
+	 * specification.
 	 */
 	struct pllpad_dividers plld = { 0 };
 	u32 ref = clock_get_pll_input_khz() * 1000, m, n, p = 0;
@@ -366,11 +368,10 @@ clock_display(u32 frequency)
 	else
 		plld.cpcon = 12;
 
-	if (best_diff) {
+	if (best_diff)
 		printk(BIOS_ERR, "%s: Failed to match output frequency %u, "
 		       "best difference is %u.\n", __func__, frequency,
 		       best_diff);
-	}
 
 	printk(BIOS_DEBUG, "%s: PLLD=%u ref=%u, m/n/p/cpcon=%u/%u/%u/%u\n",
 	       __func__, (ref / plld.m * plld.n) >> plld.p, ref, plld.m, plld.n,
@@ -424,10 +425,10 @@ void clock_sdram(u32 m, u32 n, u32 p, u32 setup, u32 ph45, u32 ph90,
 	u32 misc1 = ((setup << PLLM_MISC1_SETUP_SHIFT) |
 		     (ph45 << PLLM_MISC1_PD_LSHIFT_PH45_SHIFT) |
 		     (ph90 << PLLM_MISC1_PD_LSHIFT_PH90_SHIFT) |
-		     (ph135 << PLLM_MISC1_PD_LSHIFT_PH135_SHIFT)),
-	    misc2 = ((kvco << PLLM_MISC2_KVCO_SHIFT) |
-		     (kcp << PLLM_MISC2_KCP_SHIFT)),
-	    base;
+		     (ph135 << PLLM_MISC1_PD_LSHIFT_PH135_SHIFT));
+	u32 misc2 = ((kvco << PLLM_MISC2_KVCO_SHIFT) |
+		 (kcp << PLLM_MISC2_KCP_SHIFT));
+	u32 base;
 
 	if (same_freq)
 		emc_source |= CLK_SOURCE_EMC_MC_EMC_SAME_FREQ;
@@ -455,9 +456,9 @@ void clock_sdram(u32 m, u32 n, u32 p, u32 setup, u32 ph45, u32 ph90,
 	/* stable_time is required, before we can start to check lock. */
 	udelay(stable_time);
 
-	while (!(readl(&clk_rst->pllm_base) & PLL_BASE_LOCK)) {
+	while (!(readl(&clk_rst->pllm_base) & PLL_BASE_LOCK))
 		udelay(1);
-	}
+
 	/*
 	 * After PLLM reports being locked, we have to delay 10us before
 	 * enabling PLLM_OUT.
@@ -484,7 +485,7 @@ void clock_cpu0_config_and_reset(void *entry)
 	/* Set active CPU cluster to G */
 	clrbits_le32(&flow->cluster_control, 1);
 
-	// Set up cclk_brst and divider.
+	/* Set up cclk_brst and divider. */
 	write32((CRC_CCLK_BRST_POL_PLLX_OUT0 << 0) |
 		(CRC_CCLK_BRST_POL_PLLX_OUT0 << 4) |
 		(CRC_CCLK_BRST_POL_PLLX_OUT0 << 8) |
@@ -494,21 +495,21 @@ void clock_cpu0_config_and_reset(void *entry)
 	write32(CRC_SUPER_CCLK_DIVIDER_SUPER_CDIV_ENB,
 		&clk_rst->super_cclk_div);
 
-	// Enable the clocks for CPUs 0-3.
+	/* Enable the clocks for CPUs 0-3. */
 	uint32_t cpu_cmplx_clr = read32(&clk_rst->clk_cpu_cmplx_clr);
 	cpu_cmplx_clr |= CRC_CLK_CLR_CPU0_STP | CRC_CLK_CLR_CPU1_STP |
 			 CRC_CLK_CLR_CPU2_STP | CRC_CLK_CLR_CPU3_STP;
 	write32(cpu_cmplx_clr, &clk_rst->clk_cpu_cmplx_clr);
 
-	// Enable other CPU related clocks.
+	/* Enable other CPU related clocks. */
 	setbits_le32(&clk_rst->clk_out_enb_l, CLK_L_CPU);
 	setbits_le32(&clk_rst->clk_out_enb_v, CLK_V_CPUG);
 	setbits_le32(&clk_rst->clk_out_enb_v, CLK_V_CPULP);
 
-	// Disable the reset on the non-CPU parts of the fast cluster.
+	/* Disable the reset on the non-CPU parts of the fast cluster. */
 	write32(CRC_RST_CPUG_CLR_NONCPU,
 		&clk_rst->rst_cpug_cmplx_clr);
-	// Disable the various resets on the CPUs.
+	/* Disable the various resets on the CPUs. */
 	write32(CRC_RST_CPUG_CLR_CPU0 | CRC_RST_CPUG_CLR_CPU1 |
 		CRC_RST_CPUG_CLR_CPU2 | CRC_RST_CPUG_CLR_CPU3 |
 		CRC_RST_CPUG_CLR_DBG0 | CRC_RST_CPUG_CLR_DBG1 |
@@ -520,10 +521,10 @@ void clock_cpu0_config_and_reset(void *entry)
 		CRC_RST_CPUG_CLR_L2 | CRC_RST_CPUG_CLR_PDBG,
 		&clk_rst->rst_cpug_cmplx_clr);
 
-	// Disable the reset on the non-CPU parts of the slow cluster.
+	/* Disable the reset on the non-CPU parts of the slow cluster. */
 	write32(CRC_RST_CPULP_CLR_NONCPU,
 		&clk_rst->rst_cpulp_cmplx_clr);
-	// Disable the various resets on the LP CPU.
+	/* Disable the various resets on the LP CPU.  */
 	write32(CRC_RST_CPULP_CLR_CPU0 | CRC_RST_CPULP_CLR_DBG0 |
 		CRC_RST_CPULP_CLR_CORE0 | CRC_RST_CPULP_CLR_CX0 |
 		CRC_RST_CPULP_CLR_L2 | CRC_RST_CPULP_CLR_PDBG,
@@ -532,11 +533,10 @@ void clock_cpu0_config_and_reset(void *entry)
 
 void clock_halt_avp(void)
 {
-	for (;;) {
+	for (;;)
 		write32(FLOW_EVENT_JTAG | FLOW_EVENT_LIC_IRQ |
 			FLOW_EVENT_GIC_IRQ | FLOW_MODE_WAITEVENT,
 			&flow->halt_cop_events);
-	}
 }
 
 void clock_init(void)
@@ -601,22 +601,34 @@ void clock_init(void)
 
 void clock_enable_clear_reset(u32 l, u32 h, u32 u, u32 v, u32 w, u32 x)
 {
-	if (l) writel(l, &clk_rst->clk_enb_l_set);
-	if (h) writel(h, &clk_rst->clk_enb_h_set);
-	if (u) writel(u, &clk_rst->clk_enb_u_set);
-	if (v) writel(v, &clk_rst->clk_enb_v_set);
-	if (w) writel(w, &clk_rst->clk_enb_w_set);
-	if (x) writel(x, &clk_rst->clk_enb_x_set);
+	if (l)
+		writel(l, &clk_rst->clk_enb_l_set);
+	if (h)
+		writel(h, &clk_rst->clk_enb_h_set);
+	if (u)
+		writel(u, &clk_rst->clk_enb_u_set);
+	if (v)
+		writel(v, &clk_rst->clk_enb_v_set);
+	if (w)
+		writel(w, &clk_rst->clk_enb_w_set);
+	if (x)
+		writel(x, &clk_rst->clk_enb_x_set);
 
 	/* Give clocks time to stabilize. */
 	udelay(IO_STABILIZATION_DELAY);
 
-	if (l) writel(l, &clk_rst->rst_dev_l_clr);
-	if (h) writel(h, &clk_rst->rst_dev_h_clr);
-	if (u) writel(u, &clk_rst->rst_dev_u_clr);
-	if (v) writel(v, &clk_rst->rst_dev_v_clr);
-	if (w) writel(w, &clk_rst->rst_dev_w_clr);
-	if (x) writel(x, &clk_rst->rst_dev_x_clr);
+	if (l)
+		writel(l, &clk_rst->rst_dev_l_clr);
+	if (h)
+		writel(h, &clk_rst->rst_dev_h_clr);
+	if (u)
+		writel(u, &clk_rst->rst_dev_u_clr);
+	if (v)
+		writel(v, &clk_rst->rst_dev_v_clr);
+	if (w)
+		writel(w, &clk_rst->rst_dev_w_clr);
+	if (x)
+		writel(x, &clk_rst->rst_dev_x_clr);
 }
 
 void clock_reset_l(u32 bit)