2 * Common Motorola PowerPlus Platform--really Falcon/Raven or HAWK.
4 * Author: Mark A. Greer
7 * 2001 (c) MontaVista, Software, Inc. This file is licensed under
8 * the terms of the GNU General Public License version 2. This program
9 * is licensed "as is" without any warranty of any kind, whether express
12 #include <linux/kernel.h>
13 #include <linux/init.h>
14 #include <linux/pci.h>
16 #include <asm/byteorder.h>
20 #include <asm/pci-bridge.h>
21 #include <asm/open_pic.h>
25 * The Falcon/Raven and HAWK has 4 sets of registers:
26 * 1) PPC Registers which define the mappings from PPC bus to PCI bus,
28 * 2) PCI Registers which define the mappings from PCI bus to PPC bus and the
31 * 4) System Memory Controller (SMC) registers.
35 * Initialize the Motorola MCG Raven or HAWK host bridge.
37 * This means setting up the PPC bus to PCI memory and I/O space mappings,
38 * setting the PCI memory space address of the MPIC (mapped straight
39 * through), and ioremap'ing the mpic registers.
40 * This routine will set the PCI_CONFIG_ADDR or PCI_CONFIG_DATA
41 * addresses based on the PCI I/O address that is passed in.
42 * 'OpenPIC_Addr' will be set correctly by this routine.
45 hawk_init(struct pci_controller *hose,
47 ulong processor_pci_mem_start,
48 ulong processor_pci_mem_end,
49 ulong processor_pci_io_start,
50 ulong processor_pci_io_end,
51 ulong processor_mpic_base)
56 * Some sanity checks...
58 if (((processor_pci_mem_start&0xffff0000) != processor_pci_mem_start) ||
59 ((processor_pci_io_start &0xffff0000) != processor_pci_io_start)) {
60 printk("hawk_init: %s\n",
61 "PPC to PCI mappings must start on 64 KB boundaries");
65 if (((processor_pci_mem_end &0x0000ffff) != 0x0000ffff) ||
66 ((processor_pci_io_end &0x0000ffff) != 0x0000ffff)) {
67 printk("hawk_init: PPC to PCI mappings %s\n",
68 "must end just before a 64 KB boundaries");
72 if (((processor_pci_mem_end - processor_pci_mem_start) !=
73 (hose->mem_space.end - hose->mem_space.start)) ||
74 ((processor_pci_io_end - processor_pci_io_start) !=
75 (hose->io_space.end - hose->io_space.start))) {
76 printk("hawk_init: %s\n",
77 "PPC and PCI memory or I/O space sizes don't match");
81 if ((processor_mpic_base & 0xfffc0000) != processor_mpic_base) {
82 printk("hawk_init: %s\n",
83 "MPIC address must start on 256 MB boundary");
87 if ((pci_dram_offset & 0xffff0000) != pci_dram_offset) {
88 printk("hawk_init: %s\n",
89 "pci_dram_offset must be multiple of 64 KB");
94 * Disable previous PPC->PCI mappings.
96 out_be32((uint *)(ppc_reg_base + HAWK_PPC_XSOFF0_OFF), 0x00000000);
97 out_be32((uint *)(ppc_reg_base + HAWK_PPC_XSOFF1_OFF), 0x00000000);
98 out_be32((uint *)(ppc_reg_base + HAWK_PPC_XSOFF2_OFF), 0x00000000);
99 out_be32((uint *)(ppc_reg_base + HAWK_PPC_XSOFF3_OFF), 0x00000000);
102 * Program the XSADD/XSOFF registers to set up the PCI Mem & I/O
103 * space mappings. These are the mappings going from the processor to
106 * Note: Don't need to 'AND' start/end addresses with 0xffff0000
107 * because sanity check above ensures that they are properly
111 /* Set up PPC->PCI Mem mapping */
112 addr = processor_pci_mem_start | (processor_pci_mem_end >> 16);
113 offset = (hose->mem_space.start - processor_pci_mem_start) | 0xd2;
114 out_be32((uint *)(ppc_reg_base + HAWK_PPC_XSADD0_OFF), addr);
115 out_be32((uint *)(ppc_reg_base + HAWK_PPC_XSOFF0_OFF), offset);
117 /* Set up PPC->MPIC mapping on the bridge */
118 addr = processor_mpic_base |
119 (((processor_mpic_base + HAWK_MPIC_SIZE) >> 16) - 1);
120 /* No write posting for this PCI Mem space */
121 offset = (hose->mem_space.start - processor_pci_mem_start) | 0xc2;
123 out_be32((uint *)(ppc_reg_base + HAWK_PPC_XSADD1_OFF), addr);
124 out_be32((uint *)(ppc_reg_base + HAWK_PPC_XSOFF1_OFF), offset);
126 /* Set up PPC->PCI I/O mapping -- Contiguous I/O space */
127 addr = processor_pci_io_start | (processor_pci_io_end >> 16);
128 offset = (hose->io_space.start - processor_pci_io_start) | 0xc0;
129 out_be32((uint *)(ppc_reg_base + HAWK_PPC_XSADD3_OFF), addr);
130 out_be32((uint *)(ppc_reg_base + HAWK_PPC_XSOFF3_OFF), offset);
132 hose->io_base_virt = (void *)ioremap(processor_pci_io_start,
133 (processor_pci_io_end - processor_pci_io_start + 1));
136 * Set up the indirect method of accessing PCI config space.
137 * The PCI config addr/data pair based on start addr of PCI I/O space.
139 setup_indirect_pci(hose,
140 processor_pci_io_start + HAWK_PCI_CONFIG_ADDR_OFF,
141 processor_pci_io_start + HAWK_PCI_CONFIG_DATA_OFF);
144 * Disable previous PCI->PPC mappings.
147 /* XXXX Put in mappings from PCI bus to processor bus XXXX */
150 * Disable MPIC response to PCI I/O space (BAR 0).
151 * Make MPIC respond to PCI Mem space at specified address.
154 early_write_config_dword(hose,
160 early_write_config_dword(hose,
164 (processor_mpic_base -
165 processor_pci_mem_start +
166 hose->mem_space.start) | 0x0);
168 /* Map MPIC into virtual memory */
169 OpenPIC_Addr = ioremap(processor_mpic_base, HAWK_MPIC_SIZE);
175 * Find the amount of RAM present.
176 * This assumes that PPCBug has initialized the memory controller (SMC)
177 * on the Falcon/HAWK correctly (i.e., it does no sanity checking).
178 * It also assumes that the memory base registers are set to configure the
179 * memory as contiguous starting with "RAM A BASE", "RAM B BASE", etc.
180 * however, RAM base registers can be skipped (e.g. A, B, C are set,
181 * D is skipped but E is set is okay).
183 #define MB (1024*1024)
185 static uint reg_offset_table[] __initdata = {
186 HAWK_SMC_RAM_A_SIZE_REG_OFF,
187 HAWK_SMC_RAM_B_SIZE_REG_OFF,
188 HAWK_SMC_RAM_C_SIZE_REG_OFF,
189 HAWK_SMC_RAM_D_SIZE_REG_OFF,
190 HAWK_SMC_RAM_E_SIZE_REG_OFF,
191 HAWK_SMC_RAM_F_SIZE_REG_OFF,
192 HAWK_SMC_RAM_G_SIZE_REG_OFF,
193 HAWK_SMC_RAM_H_SIZE_REG_OFF
196 static uint falcon_size_table[] __initdata = {
197 0 * MB, /* 0 ==> 0 MB */
198 16 * MB, /* 1 ==> 16 MB */
199 32 * MB, /* 2 ==> 32 MB */
200 64 * MB, /* 3 ==> 64 MB */
201 128 * MB, /* 4 ==> 128 MB */
202 256 * MB, /* 5 ==> 256 MB */
203 1024 * MB, /* 6 ==> 1024 MB (1 GB) */
206 static uint hawk_size_table[] __initdata = {
207 0 * MB, /* 0 ==> 0 MB */
208 32 * MB, /* 1 ==> 32 MB */
209 64 * MB, /* 2 ==> 64 MB */
210 64 * MB, /* 3 ==> 64 MB */
211 128 * MB, /* 4 ==> 128 MB */
212 128 * MB, /* 5 ==> 128 MB */
213 128 * MB, /* 6 ==> 128 MB */
214 256 * MB, /* 7 ==> 256 MB */
215 256 * MB, /* 8 ==> 256 MB */
216 512 * MB, /* 9 ==> 512 MB */
220 * *** WARNING: You MUST have a BAT set up to map in the SMC regs ***
222 * Read the memory controller's registers to determine the amount of system
223 * memory. Assumes that the memory controller registers are already mapped
224 * into virtual memory--too early to use ioremap().
227 hawk_get_mem_size(uint smc_base)
230 int i, size_table_entries, reg_limit;
236 vend_dev_id = in_be32((uint *)smc_base + PCI_VENDOR_ID);
238 if (((vend_dev_id & 0xffff0000) >> 16) != PCI_VENDOR_ID_MOTOROLA) {
239 printk("hawk_get_mem_size: %s (0x%x)\n",
240 "Not a Motorola Memory Controller", vend_dev_id);
244 vend_dev_id &= 0x0000ffff;
246 if (vend_dev_id == PCI_DEVICE_ID_MOTOROLA_FALCON) {
247 size_table = falcon_size_table;
248 size_table_entries = sizeof(falcon_size_table) /
249 sizeof(falcon_size_table[0]);
251 reg_limit = FALCON_SMC_REG_COUNT;
253 else if (vend_dev_id == PCI_DEVICE_ID_MOTOROLA_HAWK) {
254 size_table = hawk_size_table;
255 size_table_entries = sizeof(hawk_size_table) /
256 sizeof(hawk_size_table[0]);
257 reg_limit = HAWK_SMC_REG_COUNT;
260 printk("hawk_get_mem_size: %s (0x%x)\n",
261 "Not a Falcon or HAWK", vend_dev_id);
267 /* Check every reg because PPCBug may skip some */
268 for (i=0; i<reg_limit; i++) {
269 val = in_8((u_char *)(smc_base + reg_offset_table[i]));
271 if (val & 0x80) { /* If enabled */
274 /* Don't go past end of size_table */
275 if (val < size_table_entries) {
276 total += size_table[val];
278 else { /* Register not set correctly */
288 hawk_mpic_init(unsigned int pci_mem_offset)
290 unsigned short devid;
291 unsigned int pci_membase;
293 /* Check the first PCI device to see if it is a Raven or Hawk. */
294 early_read_config_word(0, 0, 0, PCI_DEVICE_ID, &devid);
297 case PCI_DEVICE_ID_MOTOROLA_RAVEN:
298 case PCI_DEVICE_ID_MOTOROLA_HAWK:
305 /* Read the memory base register. */
306 early_read_config_dword(0, 0, 0, PCI_BASE_ADDRESS_1, &pci_membase);
308 if (pci_membase == 0) {
313 /* Map the MPIC registers to virtual memory. */
314 OpenPIC_Addr = ioremap(pci_membase + pci_mem_offset, 0x22000);