2 * Copyright (c) 2015 Semihalf.
3 * Copyright (c) 2015 Stormshield.
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 #include <sys/cdefs.h>
29 __FBSDID("$FreeBSD$");
31 #include <sys/param.h>
32 #include <sys/sysctl.h>
33 #include <sys/systm.h>
36 #include <machine/fdt.h>
38 #include <arm/mv/mvwin.h>
39 #include <arm/mv/mvreg.h>
40 #include <arm/mv/mvvar.h>
42 int armada38x_open_bootrom_win(void);
43 int armada38x_scu_enable(void);
44 int armada38x_win_set_iosync_barrier(void);
45 int armada38x_mbus_optimization(void);
47 static int hw_clockrate;
48 SYSCTL_INT(_hw, OID_AUTO, clockrate, CTLFLAG_RD,
49 &hw_clockrate, 0, "CPU instruction clock rate");
57 * On Armada38x TCLK can be configured to 250 MHz or 200 MHz.
58 * Current setting is read from Sample At Reset register.
60 sar = (uint32_t)get_sar_value();
61 sar = (sar & TCLK_MASK) >> TCLK_SHIFT;
73 static const uint32_t cpu_frequencies[] = {
81 sar = (uint32_t)get_sar_value();
82 sar = (sar & A38X_CPU_DDR_CLK_MASK) >> A38X_CPU_DDR_CLK_SHIFT;
83 if (sar >= nitems(cpu_frequencies))
86 hw_clockrate = cpu_frequencies[sar];
88 return (hw_clockrate * 1000 * 1000);
92 armada38x_win_set_iosync_barrier(void)
94 bus_space_handle_t vaddr_iowind;
97 rv = bus_space_map(fdtbus_bs_tag, (bus_addr_t)MV_MBUS_BRIDGE_BASE,
98 MV_CPU_SUBSYS_REGS_LEN, 0, &vaddr_iowind);
102 /* Set Sync Barrier flags for all Mbus internal units */
103 bus_space_write_4(fdtbus_bs_tag, vaddr_iowind, MV_SYNC_BARRIER_CTRL,
104 MV_SYNC_BARRIER_CTRL_ALL);
106 bus_space_barrier(fdtbus_bs_tag, vaddr_iowind, 0,
107 MV_CPU_SUBSYS_REGS_LEN, BUS_SPACE_BARRIER_WRITE);
108 bus_space_unmap(fdtbus_bs_tag, vaddr_iowind, MV_CPU_SUBSYS_REGS_LEN);
114 armada38x_open_bootrom_win(void)
116 bus_space_handle_t vaddr_iowind;
120 rv = bus_space_map(fdtbus_bs_tag, (bus_addr_t)MV_MBUS_BRIDGE_BASE,
121 MV_CPU_SUBSYS_REGS_LEN, 0, &vaddr_iowind);
125 val = (MV_BOOTROM_WIN_SIZE & IO_WIN_SIZE_MASK) << IO_WIN_SIZE_SHIFT;
126 val |= (MBUS_BOOTROM_ATTR & IO_WIN_ATTR_MASK) << IO_WIN_ATTR_SHIFT;
127 val |= (MBUS_BOOTROM_TGT_ID & IO_WIN_TGT_MASK) << IO_WIN_TGT_SHIFT;
128 /* Enable window and Sync Barrier */
129 val |= (0x1 & IO_WIN_SYNC_MASK) << IO_WIN_SYNC_SHIFT;
130 val |= (0x1 & IO_WIN_ENA_MASK) << IO_WIN_ENA_SHIFT;
132 /* Configure IO Window Control Register */
133 bus_space_write_4(fdtbus_bs_tag, vaddr_iowind, IO_WIN_9_CTRL_OFFSET,
135 /* Configure IO Window Base Register */
136 bus_space_write_4(fdtbus_bs_tag, vaddr_iowind, IO_WIN_9_BASE_OFFSET,
137 MV_BOOTROM_MEM_ADDR);
139 bus_space_barrier(fdtbus_bs_tag, vaddr_iowind, 0, MV_CPU_SUBSYS_REGS_LEN,
140 BUS_SPACE_BARRIER_WRITE);
141 bus_space_unmap(fdtbus_bs_tag, vaddr_iowind, MV_CPU_SUBSYS_REGS_LEN);
147 armada38x_mbus_optimization(void)
149 bus_space_handle_t vaddr_iowind;
152 rv = bus_space_map(fdtbus_bs_tag, (bus_addr_t)MV_MBUS_CTRL_BASE,
153 MV_MBUS_CTRL_REGS_LEN, 0, &vaddr_iowind);
158 * MBUS Units Priority Control Register - Prioritize XOR,
159 * PCIe and GbEs (ID=4,6,3,7,8) DRAM access
160 * GbE is High and others are Medium.
162 bus_space_write_4(fdtbus_bs_tag, vaddr_iowind, 0, 0x19180);
165 * Fabric Units Priority Control Register -
166 * Prioritize CPUs requests.
168 bus_space_write_4(fdtbus_bs_tag, vaddr_iowind, 0x4, 0x3000A);
171 * MBUS Units Prefetch Control Register -
172 * Pre-fetch enable for all IO masters.
174 bus_space_write_4(fdtbus_bs_tag, vaddr_iowind, 0x8, 0xFFFF);
177 * Fabric Units Prefetch Control Register -
178 * Enable the CPUs Instruction and Data prefetch.
180 bus_space_write_4(fdtbus_bs_tag, vaddr_iowind, 0xc, 0x303);
182 bus_space_barrier(fdtbus_bs_tag, vaddr_iowind, 0, MV_MBUS_CTRL_REGS_LEN,
183 BUS_SPACE_BARRIER_WRITE);
185 bus_space_unmap(fdtbus_bs_tag, vaddr_iowind, MV_MBUS_CTRL_REGS_LEN);
191 armada38x_scu_enable(void)
193 bus_space_handle_t vaddr_scu;
197 rv = bus_space_map(fdtbus_bs_tag, (bus_addr_t)MV_SCU_BASE,
198 MV_SCU_REGS_LEN, 0, &vaddr_scu);
203 val = bus_space_read_4(fdtbus_bs_tag, vaddr_scu, MV_SCU_REG_CTRL);
204 if (!(val & MV_SCU_ENABLE)) {
205 /* Enable SCU Speculative linefills to L2 */
206 val |= MV_SCU_SL_L2_ENABLE;
208 bus_space_write_4(fdtbus_bs_tag, vaddr_scu, 0,
209 val | MV_SCU_ENABLE);
212 bus_space_unmap(fdtbus_bs_tag, vaddr_scu, MV_SCU_REGS_LEN);