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@@ -121,11 +121,7 @@
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*/
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#define CFG_SDRAM_BASE 0x00000000
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#define CFG_FLASH_BASE 0x40000000
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-#ifdef DEBUG
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#define CFG_MONITOR_LEN (256 << 10) /* Reserve 256 kB for Monitor */
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-#else
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-#define CFG_MONITOR_LEN (128 << 10) /* Reserve 128 kB for Monitor */
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-#endif
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#define CFG_MONITOR_BASE CFG_FLASH_BASE
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#define CFG_MALLOC_LEN (128 << 10) /* Reserve 128 kB for malloc() */
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@@ -135,11 +131,12 @@
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* the maximum mapped by the Linux kernel during initialization.
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*/
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#define CFG_BOOTMAPSZ (8 << 20) /* Initial Memory map for Linux */
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+
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/*-----------------------------------------------------------------------
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* FLASH organization
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*/
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#define CFG_MAX_FLASH_BANKS 2 /* max number of memory banks */
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-#define CFG_MAX_FLASH_SECT 67 /* max number of sectors on one chip */
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+#define CFG_MAX_FLASH_SECT 71 /* max number of sectors on one chip */
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#define CFG_FLASH_ERASE_TOUT 120000 /* Timeout for Flash Erase (in ms) */
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#define CFG_FLASH_WRITE_TOUT 500 /* Timeout for Flash Write (in ms) */
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@@ -148,6 +145,10 @@
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#define CFG_ENV_OFFSET 0x8000 /* Offset of Environment Sector */
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#define CFG_ENV_SIZE 0x4000 /* Total Size of Environment Sector */
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+/* Address and size of Redundant Environment Sector */
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+#define CFG_ENV_OFFSET_REDUND (CFG_ENV_OFFSET+CFG_ENV_SIZE)
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+#define CFG_ENV_SIZE_REDUND (CFG_ENV_SIZE)
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+
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/*-----------------------------------------------------------------------
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* Hardware Information Block
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*/
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@@ -260,9 +261,11 @@
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#define CFG_REMAP_OR_AM 0x80000000 /* OR addr mask */
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#define CFG_PRELIM_OR_AM 0xE0000000 /* OR addr mask */
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-/* FLASH timing: ACS = 11, TRLX = 0, CSNT = 1, SCY = 5, EHTR = 1 */
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-#define CFG_OR_TIMING_FLASH (OR_CSNT_SAM | OR_ACS_DIV2 | OR_BI | \
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- OR_SCY_5_CLK | OR_EHTR)
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+/*
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+ * FLASH timing:
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+ */
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+#define CFG_OR_TIMING_FLASH (OR_ACS_DIV1 | OR_TRLX | OR_CSNT_SAM | \
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+ OR_SCY_3_CLK | OR_EHTR | OR_BI)
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#define CFG_OR0_REMAP (CFG_REMAP_OR_AM | CFG_OR_TIMING_FLASH)
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#define CFG_OR0_PRELIM (CFG_PRELIM_OR_AM | CFG_OR_TIMING_FLASH)
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@@ -291,12 +294,42 @@
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/*
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* Memory Periodic Timer Prescaler
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+ *
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+ * The Divider for PTA (refresh timer) configuration is based on an
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+ * example SDRAM configuration (64 MBit, one bank). The adjustment to
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+ * the number of chip selects (NCS) and the actually needed refresh
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+ * rate is done by setting MPTPR.
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+ *
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+ * PTA is calculated from
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+ * PTA = (gclk * Trefresh) / ((2 ^ (2 * DFBRG)) * PTP * NCS)
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+ *
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+ * gclk CPU clock (not bus clock!)
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+ * Trefresh Refresh cycle * 4 (four word bursts used)
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+ *
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+ * 4096 Rows from SDRAM example configuration
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+ * 1000 factor s -> ms
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+ * 32 PTP (pre-divider from MPTPR) from SDRAM example configuration
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+ * 4 Number of refresh cycles per period
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+ * 64 Refresh cycle in ms per number of rows
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+ * --------------------------------------------
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+ * Divider = 4096 * 32 * 1000 / (4 * 64) = 512000
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+ *
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+ * 50 MHz => 50.000.000 / Divider = 98
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+ * 66 Mhz => 66.000.000 / Divider = 129
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+ * 80 Mhz => 80.000.000 / Divider = 156
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*/
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-/* periodic timer for refresh */
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-#define CFG_MAMR_PTA 97 /* start with divider for 100 MHz */
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+#define CFG_PTA_PER_CLK ((4096 * 32 * 1000) / (4 * 64))
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+#define CFG_MAMR_PTA 98
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-/* refresh rate 15.6 us (= 64 ms / 4K = 62.4 / quad bursts) for <= 128 MBit */
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+/*
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+ * For 16 MBit, refresh rates could be 31.3 us
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+ * (= 64 ms / 2K = 125 / quad bursts).
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+ * For a simpler initialization, 15.6 us is used instead.
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+ *
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+ * #define CFG_MPTPR_2BK_2K MPTPR_PTP_DIV32 for 2 banks
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+ * #define CFG_MPTPR_1BK_2K MPTPR_PTP_DIV64 for 1 bank
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+ */
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#define CFG_MPTPR_2BK_4K MPTPR_PTP_DIV16 /* setting for 2 banks */
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#define CFG_MPTPR_1BK_4K MPTPR_PTP_DIV32 /* setting for 1 bank */
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