TQM85xx: Change memory map to support Flash memory > 128 MiB

Some TQM85xx boards could be equipped with up to 1 GiB (NOR) Flash
memory. The current memory map only supports up to 128 MiB Flash.
This patch adds the configuration option CONFIG_TQM_BIGFLASH. If
set, up to 1 GiB flash is supported. To achieve this, the memory
map has to be adjusted in great parts (for example the CCSRBAR is
moved from 0xE0000000 to 0xA0000000).

If you want to boot Linux with CONFIG_TQM_BIGFLASH set, the new
memory map also has to be considered in the kernel (changed
CCSRBAR address, changed PCI IO base address, ...). Please use
an appropriate Flat Device Tree blob (tqm8548.dtb).

Signed-off-by: Martin Krause <martin.krause@tqs.de>
Signed-off-by: Wolfgang Grandegger <wg@grandegger.com>

2 files changed, 122 insertions, 4 deletions

diff --git a/board/tqc/tqm85xx/law.c b/board/tqc/tqm85xx/law.c
index 914ce68..b4e663b 100644
--- a/board/tqc/tqm85xx/law.c
+++ b/board/tqc/tqm85xx/law.c
@@ -30,6 +30,8 @@
 /*
  * LAW(Local Access Window) configuration:
  *
+ * Standard mapping:
+ *
  * 0x0000_0000	   0x7fff_ffff	   DDR			   2G
  * 0x8000_0000	   0x9fff_ffff	   PCI1 MEM		   512M
  * 0xc000_0000	   0xdfff_ffff	   RapidIO or PCI express  512M
@@ -37,22 +39,41 @@
  * 0xe200_0000	   0xe2ff_ffff	   PCI1 IO		   16M
  * 0xe300_0000	   0xe3ff_ffff	   CAN and NAND Flash	   16M
  * 0xef00_0000	   0xefff_ffff     PCI express IO          16M
- * 0xfe00_0000	   0xffff_ffff	   FLASH (boot bank)	   32M
+ * 0xfc00_0000	   0xffff_ffff	   FLASH (boot bank)	   128M
+ *
+ * Big FLASH mapping:
+ *
+ * 0x0000_0000	   0x7fff_ffff	   DDR			   2G
+ * 0x8000_0000	   0x9fff_ffff	   PCI1 MEM		   512M
+ * 0xa000_0000	   0xa000_ffff	   CCSR			   1M
+ * 0xa200_0000	   0xa2ff_ffff	   PCI1 IO		   16M
+ * 0xa300_0000	   0xa3ff_ffff	   CAN and NAND Flash	   16M
+ * 0xaf00_0000	   0xafff_ffff     PCI express IO          16M
+ * 0xb000_0000	   0xbfff_ffff	   RapidIO or PCI express  256M
+ * 0xc000_0000	   0xffff_ffff	   FLASH (boot bank)	   1G
  *
  * Notes:
  *    CCSRBAR and L2-as-SRAM don't need a configured Local Access Window.
  *    If flash is 8M at default position (last 8M), no LAW needed.
  */
 
+#ifdef CONFIG_TQM_BIGFLASH
+#define LAW_3_SIZE LAW_SIZE_1G
+#define LAW_5_SIZE LAW_SIZE_256M
+#else
+#define LAW_3_SIZE LAW_SIZE_128M
+#define LAW_5_SIZE LAW_SIZE_512M
+#endif
+
 struct law_entry law_table[] = {
 	SET_LAW_ENTRY (1, CFG_DDR_SDRAM_BASE, LAW_SIZE_512M, LAW_TRGT_IF_DDR),
 	SET_LAW_ENTRY (2, CFG_PCI1_MEM_PHYS, LAW_SIZE_512M, LAW_TRGT_IF_PCI),
-	SET_LAW_ENTRY (3, CFG_LBC_FLASH_BASE, LAW_SIZE_128M, LAW_TRGT_IF_LBC),
+	SET_LAW_ENTRY (3, CFG_LBC_FLASH_BASE, LAW_3_SIZE, LAW_TRGT_IF_LBC),
 	SET_LAW_ENTRY (4, CFG_PCI1_IO_PHYS, LAW_SIZE_16M, LAW_TRGT_IF_PCI),
 #ifdef CONFIG_PCIE1
-	SET_LAW_ENTRY (5, CFG_PCIE1_MEM_BASE, LAW_SIZE_512M, LAW_TRGT_IF_PCIE_1),
+	SET_LAW_ENTRY (5, CFG_PCIE1_MEM_BASE, LAW_5_SIZE, LAW_TRGT_IF_PCIE_1),
 #else /* !CONFIG_PCIE1 */
-	SET_LAW_ENTRY (5, CFG_RIO_MEM_BASE, LAW_SIZE_512M, LAW_TRGT_IF_RIO),
+	SET_LAW_ENTRY (5, CFG_RIO_MEM_BASE, LAW_5_SIZE, LAW_TRGT_IF_RIO),
 #endif /* CONFIG_PCIE1 */
 #if defined(CONFIG_CAN_DRIVER) || defined(CONFIG_NAND)
 	SET_LAW_ENTRY (6, CFG_CAN_BASE, LAW_SIZE_16M, LAW_TRGT_IF_LBC),
diff --git a/board/tqc/tqm85xx/tlb.c b/board/tqc/tqm85xx/tlb.c
index 7f4efc1..380448a 100644
--- a/board/tqc/tqm85xx/tlb.c
+++ b/board/tqc/tqm85xx/tlb.c
@@ -44,6 +44,7 @@ struct fsl_e_tlb_entry tlb_table[] = {
 		       MAS3_SX | MAS3_SW | MAS3_SR, 0,
 		       0, 0, BOOKE_PAGESZ_4K, 0),
 
+#ifndef CONFIG_TQM_BIGFLASH
 	/*
 	 * TLB 0, 1:	128M	Non-cacheable, guarded
 	 * 0xf8000000	128M	FLASH
@@ -146,6 +147,102 @@ struct fsl_e_tlb_entry tlb_table[] = {
 		       0, 9, BOOKE_PAGESZ_16M, 1),
 #endif /* CONFIG_PCIE */
 
+#else /* CONFIG_TQM_BIGFLASH */
+
+	/*
+	 * TLB 0,1,2,3:	  1G	Non-cacheable, guarded
+	 * 0xc0000000	  1G	FLASH
+	 * Out of reset this entry is only 4K.
+	 */
+	SET_TLB_ENTRY (1, CFG_FLASH_BASE, CFG_FLASH_BASE,
+		       MAS3_SX | MAS3_SW | MAS3_SR, MAS2_I | MAS2_G,
+		       0, 3, BOOKE_PAGESZ_256M, 1),
+	SET_TLB_ENTRY (1, CFG_FLASH_BASE + 0x10000000,
+		       CFG_FLASH_BASE + 0x10000000,
+		       MAS3_SX | MAS3_SW | MAS3_SR, MAS2_I | MAS2_G,
+		       0, 2, BOOKE_PAGESZ_256M, 1),
+	SET_TLB_ENTRY (1, CFG_FLASH_BASE + 0x20000000,
+		       CFG_FLASH_BASE + 0x20000000,
+		       MAS3_SX | MAS3_SW | MAS3_SR, MAS2_I | MAS2_G,
+		       0, 1, BOOKE_PAGESZ_256M, 1),
+	SET_TLB_ENTRY (1, CFG_FLASH_BASE + 0x30000000,
+		       CFG_FLASH_BASE + 0x30000000,
+		       MAS3_SX | MAS3_SW | MAS3_SR, MAS2_I | MAS2_G,
+		       0, 0, BOOKE_PAGESZ_256M, 1),
+
+	/*
+	 * TLB 4:	256M	Non-cacheable, guarded
+	 * 0x80000000	256M	PCI1 MEM First half
+	 */
+	SET_TLB_ENTRY (1, CFG_PCI1_MEM_PHYS, CFG_PCI1_MEM_PHYS,
+		       MAS3_SX | MAS3_SW | MAS3_SR, MAS2_I | MAS2_G,
+		       0, 4, BOOKE_PAGESZ_256M, 1),
+
+	/*
+	 * TLB 5:	256M	Non-cacheable, guarded
+	 * 0x90000000	256M	PCI1 MEM Second half
+	 */
+	SET_TLB_ENTRY (1, CFG_PCI1_MEM_PHYS + 0x10000000,
+		       CFG_PCI1_MEM_PHYS + 0x10000000,
+		       MAS3_SX | MAS3_SW | MAS3_SR, MAS2_I | MAS2_G,
+		       0, 5, BOOKE_PAGESZ_256M, 1),
+
+#ifdef CONFIG_PCIE1
+	/*
+	 * TLB 6:	256M	Non-cacheable, guarded
+	 * 0xc0000000	256M	PCI express MEM First half
+	 */
+	SET_TLB_ENTRY (1, CFG_PCIE1_MEM_BASE, CFG_PCIE1_MEM_BASE,
+		       MAS3_SX | MAS3_SW | MAS3_SR, MAS2_I | MAS2_G,
+		       0, 6, BOOKE_PAGESZ_256M, 1),
+#else /* !CONFIG_PCIE */
+	/*
+	 * TLB 6:	256M	Non-cacheable, guarded
+	 * 0xb0000000	256M	Rapid IO MEM First half
+	 */
+	SET_TLB_ENTRY (1, CFG_RIO_MEM_BASE, CFG_RIO_MEM_BASE,
+		       MAS3_SX | MAS3_SW | MAS3_SR, MAS2_I | MAS2_G,
+		       0, 6, BOOKE_PAGESZ_256M, 1),
+
+#endif /* CONFIG_PCIE */
+
+	/*
+	 * TLB 7:	 64M	Non-cacheable, guarded
+	 * 0xa0000000	  1M	CCSRBAR
+	 * 0xa2000000	 16M	PCI1 IO
+	 * 0xa3000000	 16M	CAN and NAND Flash
+	 */
+	SET_TLB_ENTRY (1, CFG_CCSRBAR, CFG_CCSRBAR_PHYS,
+		       MAS3_SX | MAS3_SW | MAS3_SR, MAS2_I | MAS2_G,
+		       0, 7, BOOKE_PAGESZ_64M, 1),
+
+	/*
+	 * TLB 8+9:	512M	 DDR, cache disabled (needed for memory test)
+	 * 0x00000000	512M	 DDR System memory
+	 * Without SPD EEPROM configured DDR, this must be setup manually.
+	 * Make sure the TLB count at the top of this table is correct.
+	 * Likely it needs to be increased by two for these entries.
+	 */
+	SET_TLB_ENTRY (1, CFG_DDR_SDRAM_BASE, CFG_DDR_SDRAM_BASE,
+		       MAS3_SX | MAS3_SW | MAS3_SR, MAS2_I | MAS2_G,
+		       0, 8, BOOKE_PAGESZ_256M, 1),
+
+	SET_TLB_ENTRY (1, CFG_DDR_SDRAM_BASE + 0x10000000,
+		       CFG_DDR_SDRAM_BASE + 0x10000000,
+		       MAS3_SX | MAS3_SW | MAS3_SR, MAS2_I | MAS2_G,
+		       0, 9, BOOKE_PAGESZ_256M, 1),
+
+#ifdef CONFIG_PCIE1
+	/*
+	 * TLB 10:	 16M	Non-cacheable, guarded
+	 * 0xaf000000	 16M	PCI express IO
+	 */
+	SET_TLB_ENTRY (1, CFG_PCIE1_IO_BASE, CFG_PCIE1_IO_BASE,
+		       MAS3_SX | MAS3_SW | MAS3_SR, MAS2_I | MAS2_G,
+		       0, 10, BOOKE_PAGESZ_16M, 1),
+#endif /* CONFIG_PCIE */
+
+#endif /* CONFIG_TQM_BIGFLASH */
 };
 
 int num_tlb_entries = ARRAY_SIZE (tlb_table);