x86: ivybridge: Implement SDRAM init
Implement SDRAM init using the Memory Reference Code (mrc.bin) provided in
the board directory and the SDRAM SPD information in the device tree. This
also needs the Intel Management Engine (me.bin) to work. Binary blobs
everywhere: so far we have MRC, ME and microcode.
SDRAM init works by setting up various parameters and calling the MRC. This
in turn does some sort of magic to work out how much memory there is and
the timing parameters to use. It also sets up the DRAM controllers. When
the MRC returns, we use the information it provides to map out the
available memory in U-Boot.
U-Boot normally moves itself to the top of RAM. On x86 the RAM is not
generally contiguous, and anyway some RAM may be above 4GB which doesn't
work in 32-bit mode. So we relocate to the top of the largest block of
RAM we can find below 4GB. Memory above 4GB is accessible with special
functions (see physmem).
It would be possible to build U-Boot in 64-bit mode but this wouldn't
necessarily provide any more memory, since the largest block is often below
4GB. Anyway U-Boot doesn't need huge amounts of memory - even a very large
ramdisk seldom exceeds 100-200MB. U-Boot has support for booting 64-bit
kernels directly so this does not pose a limitation in that area. Also there
are probably parts of U-Boot that will not work correctly in 64-bit mode.
The MRC is one.
There is some work remaining in this area. Since memory init is very slow
(over 500ms) it is possible to save the parameters in SPI flash to speed it
up next time. Suspend/resume support is not fully implemented, or at least
it is not efficient.
With this patch, link boots to a prompt.
Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/arch/x86/include/asm/arch-ivybridge/pch.h b/arch/x86/include/asm/arch-ivybridge/pch.h
index ae338e3..c6efdb8 100644
--- a/arch/x86/include/asm/arch-ivybridge/pch.h
+++ b/arch/x86/include/asm/arch-ivybridge/pch.h
@@ -31,6 +31,13 @@
/* PCI Configuration Space (D31:F0): LPC */
#define PCH_LPC_DEV PCI_BDF(0, 0x1f, 0)
+#define GEN_PMCON_1 0xa0
+#define GEN_PMCON_2 0xa2
+#define GEN_PMCON_3 0xa4
+#define ETR3 0xac
+#define ETR3_CWORWRE (1 << 18)
+#define ETR3_CF9GR (1 << 20)
+
#define PMBASE 0x40
#define ACPI_CNTL 0x44
#define BIOS_CNTL 0xDC
@@ -126,12 +133,97 @@
#define RPC 0x0400 /* 32bit */
#define RPFN 0x0404 /* 32bit */
+#define TRSR 0x1e00 /* 8bit */
+#define TRCR 0x1e10 /* 64bit */
+#define TWDR 0x1e18 /* 64bit */
+
+#define IOTR0 0x1e80 /* 64bit */
+#define IOTR1 0x1e88 /* 64bit */
+#define IOTR2 0x1e90 /* 64bit */
+#define IOTR3 0x1e98 /* 64bit */
+
+#define TCTL 0x3000 /* 8bit */
+
+#define NOINT 0
+#define INTA 1
+#define INTB 2
+#define INTC 3
+#define INTD 4
+
+#define DIR_IDR 12 /* Interrupt D Pin Offset */
+#define DIR_ICR 8 /* Interrupt C Pin Offset */
+#define DIR_IBR 4 /* Interrupt B Pin Offset */
+#define DIR_IAR 0 /* Interrupt A Pin Offset */
+
+#define PIRQA 0
+#define PIRQB 1
+#define PIRQC 2
+#define PIRQD 3
+#define PIRQE 4
+#define PIRQF 5
+#define PIRQG 6
+#define PIRQH 7
+
+/* IO Buffer Programming */
+#define IOBPIRI 0x2330
+#define IOBPD 0x2334
+#define IOBPS 0x2338
+#define IOBPS_RW_BX ((1 << 9)|(1 << 10))
+#define IOBPS_WRITE_AX ((1 << 9)|(1 << 10))
+#define IOBPS_READ_AX ((1 << 8)|(1 << 9)|(1 << 10))
+
+#define D31IP 0x3100 /* 32bit */
+#define D31IP_TTIP 24 /* Thermal Throttle Pin */
+#define D31IP_SIP2 20 /* SATA Pin 2 */
+#define D31IP_SMIP 12 /* SMBUS Pin */
+#define D31IP_SIP 8 /* SATA Pin */
+#define D30IP 0x3104 /* 32bit */
+#define D30IP_PIP 0 /* PCI Bridge Pin */
+#define D29IP 0x3108 /* 32bit */
+#define D29IP_E1P 0 /* EHCI #1 Pin */
+#define D28IP 0x310c /* 32bit */
+#define D28IP_P8IP 28 /* PCI Express Port 8 */
+#define D28IP_P7IP 24 /* PCI Express Port 7 */
+#define D28IP_P6IP 20 /* PCI Express Port 6 */
+#define D28IP_P5IP 16 /* PCI Express Port 5 */
+#define D28IP_P4IP 12 /* PCI Express Port 4 */
+#define D28IP_P3IP 8 /* PCI Express Port 3 */
+#define D28IP_P2IP 4 /* PCI Express Port 2 */
+#define D28IP_P1IP 0 /* PCI Express Port 1 */
+#define D27IP 0x3110 /* 32bit */
+#define D27IP_ZIP 0 /* HD Audio Pin */
+#define D26IP 0x3114 /* 32bit */
+#define D26IP_E2P 0 /* EHCI #2 Pin */
+#define D25IP 0x3118 /* 32bit */
+#define D25IP_LIP 0 /* GbE LAN Pin */
+#define D22IP 0x3124 /* 32bit */
+#define D22IP_KTIP 12 /* KT Pin */
+#define D22IP_IDERIP 8 /* IDE-R Pin */
+#define D22IP_MEI2IP 4 /* MEI #2 Pin */
+#define D22IP_MEI1IP 0 /* MEI #1 Pin */
+#define D20IP 0x3128 /* 32bit */
+#define D20IP_XHCIIP 0
+#define D31IR 0x3140 /* 16bit */
+#define D30IR 0x3142 /* 16bit */
+#define D29IR 0x3144 /* 16bit */
+#define D28IR 0x3146 /* 16bit */
+#define D27IR 0x3148 /* 16bit */
+#define D26IR 0x314c /* 16bit */
+#define D25IR 0x3150 /* 16bit */
+#define D22IR 0x315c /* 16bit */
+#define D20IR 0x3160 /* 16bit */
+#define OIC 0x31fe /* 16bit */
+
#define SPI_FREQ_SWSEQ 0x3893
#define SPI_DESC_COMP0 0x38b0
#define SPI_FREQ_WR_ERA 0x38b4
#define SOFT_RESET_CTRL 0x38f4
#define SOFT_RESET_DATA 0x38f8
+#define DIR_ROUTE(a, b, c, d) \
+ (((d) << DIR_IDR) | ((c) << DIR_ICR) | \
+ ((b) << DIR_IBR) | ((a) << DIR_IAR))
+
#define RC 0x3400 /* 32bit */
#define HPTC 0x3404 /* 32bit */
#define GCS 0x3410 /* 32bit */
@@ -142,6 +234,27 @@
#define FD2 0x3428 /* 32bit */
#define CG 0x341c /* 32bit */
+/* Function Disable 1 RCBA 0x3418 */
+#define PCH_DISABLE_ALWAYS ((1 << 0)|(1 << 26))
+#define PCH_DISABLE_P2P (1 << 1)
+#define PCH_DISABLE_SATA1 (1 << 2)
+#define PCH_DISABLE_SMBUS (1 << 3)
+#define PCH_DISABLE_HD_AUDIO (1 << 4)
+#define PCH_DISABLE_EHCI2 (1 << 13)
+#define PCH_DISABLE_LPC (1 << 14)
+#define PCH_DISABLE_EHCI1 (1 << 15)
+#define PCH_DISABLE_PCIE(x) (1 << (16 + x))
+#define PCH_DISABLE_THERMAL (1 << 24)
+#define PCH_DISABLE_SATA2 (1 << 25)
+#define PCH_DISABLE_XHCI (1 << 27)
+
+/* Function Disable 2 RCBA 0x3428 */
+#define PCH_DISABLE_KT (1 << 4)
+#define PCH_DISABLE_IDER (1 << 3)
+#define PCH_DISABLE_MEI2 (1 << 2)
+#define PCH_DISABLE_MEI1 (1 << 1)
+#define PCH_ENABLE_DBDF (1 << 0)
+
/* ICH7 GPIOBASE */
#define GPIO_USE_SEL 0x00
#define GP_IO_SEL 0x04