ppc: Move cpu/$CPU to arch/ppc/cpu/$CPU

Signed-off-by: Peter Tyser <ptyser@xes-inc.com>

1 files changed, 352 insertions, 0 deletions

diff --git a/arch/ppc/cpu/ppc4xx/tlb.c b/arch/ppc/cpu/ppc4xx/tlb.c
new file mode 100644
index 0000000..24a9a9c
--- /dev/null
+++ b/arch/ppc/cpu/ppc4xx/tlb.c
@@ -0,0 +1,352 @@
+/*
+ * (C) Copyright 2007
+ * Stefan Roese, DENX Software Engineering, sr@denx.de.
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.	 See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h>
+
+#if defined(CONFIG_440)
+
+#include <ppc440.h>
+#include <asm/cache.h>
+#include <asm/io.h>
+#include <asm/mmu.h>
+
+typedef struct region {
+	u64 base;
+	u32 size;
+	u32 tlb_word2_i_value;
+} region_t;
+
+void remove_tlb(u32 vaddr, u32 size)
+{
+	int i;
+	u32 tlb_word0_value;
+	u32 tlb_vaddr;
+	u32 tlb_size = 0;
+
+	for (i=0; i<PPC4XX_TLB_SIZE; i++) {
+		tlb_word0_value = mftlb1(i);
+		tlb_vaddr = TLB_WORD0_EPN_DECODE(tlb_word0_value);
+		if (((tlb_word0_value & TLB_WORD0_V_MASK) == TLB_WORD0_V_ENABLE) &&
+		    (tlb_vaddr >= vaddr)) {
+			/*
+			 * TLB is enabled and start address is lower or equal
+			 * than the area we are looking for. Now we only have
+			 * to check the size/end address for a match.
+			 */
+			switch (tlb_word0_value & TLB_WORD0_SIZE_MASK) {
+			case TLB_WORD0_SIZE_1KB:
+				tlb_size = 1 << 10;
+				break;
+			case TLB_WORD0_SIZE_4KB:
+				tlb_size = 4 << 10;
+				break;
+			case TLB_WORD0_SIZE_16KB:
+				tlb_size = 16 << 10;
+				break;
+			case TLB_WORD0_SIZE_64KB:
+				tlb_size = 64 << 10;
+				break;
+			case TLB_WORD0_SIZE_256KB:
+				tlb_size = 256 << 10;
+				break;
+			case TLB_WORD0_SIZE_1MB:
+				tlb_size = 1 << 20;
+				break;
+			case TLB_WORD0_SIZE_16MB:
+				tlb_size = 16 << 20;
+				break;
+			case TLB_WORD0_SIZE_256MB:
+				tlb_size = 256 << 20;
+				break;
+			}
+
+			/*
+			 * Now check the end-address if it's in the range
+			 */
+			if ((tlb_vaddr + tlb_size - 1) <= (vaddr + size - 1))
+				/*
+				 * Found a TLB in the range.
+				 * Disable it by writing 0 to tlb0 word.
+				 */
+				mttlb1(i, 0);
+		}
+	}
+
+	/* Execute an ISYNC instruction so that the new TLB entry takes effect */
+	asm("isync");
+}
+
+/*
+ * Change the I attribute (cache inhibited) of a TLB or multiple TLB's.
+ * This function is used to either turn cache on or off in a specific
+ * memory area.
+ */
+void change_tlb(u32 vaddr, u32 size, u32 tlb_word2_i_value)
+{
+	int i;
+	u32 tlb_word0_value;
+	u32 tlb_word2_value;
+	u32 tlb_vaddr;
+	u32 tlb_size = 0;
+
+	for (i=0; i<PPC4XX_TLB_SIZE; i++) {
+		tlb_word0_value = mftlb1(i);
+		tlb_vaddr = TLB_WORD0_EPN_DECODE(tlb_word0_value);
+		if (((tlb_word0_value & TLB_WORD0_V_MASK) == TLB_WORD0_V_ENABLE) &&
+		    (tlb_vaddr >= vaddr)) {
+			/*
+			 * TLB is enabled and start address is lower or equal
+			 * than the area we are looking for. Now we only have
+			 * to check the size/end address for a match.
+			 */
+			switch (tlb_word0_value & TLB_WORD0_SIZE_MASK) {
+			case TLB_WORD0_SIZE_1KB:
+				tlb_size = 1 << 10;
+				break;
+			case TLB_WORD0_SIZE_4KB:
+				tlb_size = 4 << 10;
+				break;
+			case TLB_WORD0_SIZE_16KB:
+				tlb_size = 16 << 10;
+				break;
+			case TLB_WORD0_SIZE_64KB:
+				tlb_size = 64 << 10;
+				break;
+			case TLB_WORD0_SIZE_256KB:
+				tlb_size = 256 << 10;
+				break;
+			case TLB_WORD0_SIZE_1MB:
+				tlb_size = 1 << 20;
+				break;
+			case TLB_WORD0_SIZE_16MB:
+				tlb_size = 16 << 20;
+				break;
+			case TLB_WORD0_SIZE_256MB:
+				tlb_size = 256 << 20;
+				break;
+			}
+
+			/*
+			 * Now check the end-address if it's in the range
+			 */
+			if (((tlb_vaddr + tlb_size - 1) <= (vaddr + size - 1)) ||
+			    ((tlb_vaddr < (vaddr + size - 1)) &&
+			     ((tlb_vaddr + tlb_size - 1) > (vaddr + size - 1)))) {
+				/*
+				 * Found a TLB in the range.
+				 * Change cache attribute in tlb2 word.
+				 */
+				tlb_word2_value =
+					TLB_WORD2_U0_DISABLE | TLB_WORD2_U1_DISABLE |
+					TLB_WORD2_U2_DISABLE | TLB_WORD2_U3_DISABLE |
+					TLB_WORD2_W_DISABLE | tlb_word2_i_value |
+					TLB_WORD2_M_DISABLE | TLB_WORD2_G_DISABLE |
+					TLB_WORD2_E_DISABLE | TLB_WORD2_UX_ENABLE |
+					TLB_WORD2_UW_ENABLE | TLB_WORD2_UR_ENABLE |
+					TLB_WORD2_SX_ENABLE | TLB_WORD2_SW_ENABLE |
+					TLB_WORD2_SR_ENABLE;
+
+				/*
+				 * Now either flush or invalidate the dcache
+				 */
+				if (tlb_word2_i_value)
+					flush_dcache();
+				else
+					invalidate_dcache();
+
+				mttlb3(i, tlb_word2_value);
+				asm("iccci 0,0");
+			}
+		}
+	}
+
+	/* Execute an ISYNC instruction so that the new TLB entry takes effect */
+	asm("isync");
+}
+
+static int add_tlb_entry(u64 phys_addr,
+			 u32 virt_addr,
+			 u32 tlb_word0_size_value,
+			 u32 tlb_word2_i_value)
+{
+	int i;
+	unsigned long tlb_word0_value;
+	unsigned long tlb_word1_value;
+	unsigned long tlb_word2_value;
+
+	/* First, find the index of a TLB entry not being used */
+	for (i=0; i<PPC4XX_TLB_SIZE; i++) {
+		tlb_word0_value = mftlb1(i);
+		if ((tlb_word0_value & TLB_WORD0_V_MASK) == TLB_WORD0_V_DISABLE)
+			break;
+	}
+	if (i >= PPC4XX_TLB_SIZE)
+		return -1;
+
+	/* Second, create the TLB entry */
+	tlb_word0_value = TLB_WORD0_EPN_ENCODE(virt_addr) | TLB_WORD0_V_ENABLE |
+		TLB_WORD0_TS_0 | tlb_word0_size_value;
+	tlb_word1_value = TLB_WORD1_RPN_ENCODE((u32)phys_addr) |
+		TLB_WORD1_ERPN_ENCODE(phys_addr >> 32);
+	tlb_word2_value = TLB_WORD2_U0_DISABLE | TLB_WORD2_U1_DISABLE |
+		TLB_WORD2_U2_DISABLE | TLB_WORD2_U3_DISABLE |
+		TLB_WORD2_W_DISABLE | tlb_word2_i_value |
+		TLB_WORD2_M_DISABLE | TLB_WORD2_G_DISABLE |
+		TLB_WORD2_E_DISABLE | TLB_WORD2_UX_ENABLE |
+		TLB_WORD2_UW_ENABLE | TLB_WORD2_UR_ENABLE |
+		TLB_WORD2_SX_ENABLE | TLB_WORD2_SW_ENABLE |
+		TLB_WORD2_SR_ENABLE;
+
+	/* Wait for all memory accesses to complete */
+	sync();
+
+	/* Third, add the TLB entries */
+	mttlb1(i, tlb_word0_value);
+	mttlb2(i, tlb_word1_value);
+	mttlb3(i, tlb_word2_value);
+
+	/* Execute an ISYNC instruction so that the new TLB entry takes effect */
+	asm("isync");
+
+	return 0;
+}
+
+static void program_tlb_addr(u64 phys_addr,
+			     u32 virt_addr,
+			     u32 mem_size,
+			     u32 tlb_word2_i_value)
+{
+	int rc;
+	int tlb_i;
+
+	tlb_i = tlb_word2_i_value;
+	while (mem_size != 0) {
+		rc = 0;
+		/* Add the TLB entries in to map the region. */
+		if (((phys_addr & TLB_256MB_ALIGN_MASK) == phys_addr) &&
+		    (mem_size >= TLB_256MB_SIZE)) {
+			/* Add a 256MB TLB entry */
+			if ((rc = add_tlb_entry(phys_addr, virt_addr,
+						TLB_WORD0_SIZE_256MB, tlb_i)) == 0) {
+				mem_size -= TLB_256MB_SIZE;
+				phys_addr += TLB_256MB_SIZE;
+				virt_addr += TLB_256MB_SIZE;
+			}
+		} else if (((phys_addr & TLB_16MB_ALIGN_MASK) == phys_addr) &&
+			   (mem_size >= TLB_16MB_SIZE)) {
+			/* Add a 16MB TLB entry */
+			if ((rc = add_tlb_entry(phys_addr, virt_addr,
+						TLB_WORD0_SIZE_16MB, tlb_i)) == 0) {
+				mem_size -= TLB_16MB_SIZE;
+				phys_addr += TLB_16MB_SIZE;
+				virt_addr += TLB_16MB_SIZE;
+			}
+		} else if (((phys_addr & TLB_1MB_ALIGN_MASK) == phys_addr) &&
+			   (mem_size >= TLB_1MB_SIZE)) {
+			/* Add a 1MB TLB entry */
+			if ((rc = add_tlb_entry(phys_addr, virt_addr,
+						TLB_WORD0_SIZE_1MB, tlb_i)) == 0) {
+				mem_size -= TLB_1MB_SIZE;
+				phys_addr += TLB_1MB_SIZE;
+				virt_addr += TLB_1MB_SIZE;
+			}
+		} else if (((phys_addr & TLB_256KB_ALIGN_MASK) == phys_addr) &&
+			   (mem_size >= TLB_256KB_SIZE)) {
+			/* Add a 256KB TLB entry */
+			if ((rc = add_tlb_entry(phys_addr, virt_addr,
+						TLB_WORD0_SIZE_256KB, tlb_i)) == 0) {
+				mem_size -= TLB_256KB_SIZE;
+				phys_addr += TLB_256KB_SIZE;
+				virt_addr += TLB_256KB_SIZE;
+			}
+		} else if (((phys_addr & TLB_64KB_ALIGN_MASK) == phys_addr) &&
+			   (mem_size >= TLB_64KB_SIZE)) {
+			/* Add a 64KB TLB entry */
+			if ((rc = add_tlb_entry(phys_addr, virt_addr,
+						TLB_WORD0_SIZE_64KB, tlb_i)) == 0) {
+				mem_size -= TLB_64KB_SIZE;
+				phys_addr += TLB_64KB_SIZE;
+				virt_addr += TLB_64KB_SIZE;
+			}
+		} else if (((phys_addr & TLB_16KB_ALIGN_MASK) == phys_addr) &&
+			   (mem_size >= TLB_16KB_SIZE)) {
+			/* Add a 16KB TLB entry */
+			if ((rc = add_tlb_entry(phys_addr, virt_addr,
+						TLB_WORD0_SIZE_16KB, tlb_i)) == 0) {
+				mem_size -= TLB_16KB_SIZE;
+				phys_addr += TLB_16KB_SIZE;
+				virt_addr += TLB_16KB_SIZE;
+			}
+		} else if (((phys_addr & TLB_4KB_ALIGN_MASK) == phys_addr) &&
+			   (mem_size >= TLB_4KB_SIZE)) {
+			/* Add a 4KB TLB entry */
+			if ((rc = add_tlb_entry(phys_addr, virt_addr,
+						TLB_WORD0_SIZE_4KB, tlb_i)) == 0) {
+				mem_size -= TLB_4KB_SIZE;
+				phys_addr += TLB_4KB_SIZE;
+				virt_addr += TLB_4KB_SIZE;
+			}
+		} else if (((phys_addr & TLB_1KB_ALIGN_MASK) == phys_addr) &&
+			   (mem_size >= TLB_1KB_SIZE)) {
+			/* Add a 1KB TLB entry */
+			if ((rc = add_tlb_entry(phys_addr, virt_addr,
+						TLB_WORD0_SIZE_1KB, tlb_i)) == 0) {
+				mem_size -= TLB_1KB_SIZE;
+				phys_addr += TLB_1KB_SIZE;
+				virt_addr += TLB_1KB_SIZE;
+			}
+		} else {
+			printf("ERROR: no TLB size exists for the base address 0x%llx.\n",
+				phys_addr);
+		}
+
+		if (rc != 0)
+			printf("ERROR: no TLB entries available for the base addr 0x%llx.\n",
+				phys_addr);
+	}
+
+	return;
+}
+
+/*
+ * Program one (or multiple) TLB entries for one memory region
+ *
+ * Common usage for boards with SDRAM DIMM modules to dynamically
+ * configure the TLB's for the SDRAM
+ */
+void program_tlb(u64 phys_addr, u32 virt_addr, u32 size, u32 tlb_word2_i_value)
+{
+	region_t region_array;
+
+	region_array.base = phys_addr;
+	region_array.size = size;
+	region_array.tlb_word2_i_value = tlb_word2_i_value;	/* en-/disable cache */
+
+	/* Call the routine to add in the tlb entries for the memory regions */
+	program_tlb_addr(region_array.base, virt_addr, region_array.size,
+			 region_array.tlb_word2_i_value);
+
+	return;
+}
+
+#endif /* CONFIG_440 */