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[Qemu-devel] [RFC 3/3] arm: xilinx_zynq: Add linux pre-boot
From: |
Peter Crosthwaite |
Subject: |
[Qemu-devel] [RFC 3/3] arm: xilinx_zynq: Add linux pre-boot |
Date: |
Fri, 9 Oct 2015 20:13:27 -0700 |
Add a Linux-specific pre-boot routine that matches the device
specific bootloaders behaviour. This is needed for modern Linux that
expects the ARM PLL in SLCR to be a more even value (not 26).
FIXME: The blob population should only happen on Linux boots.
Signed-off-by: Peter Crosthwaite <address@hidden>
---
hw/arm/xilinx_zynq.c | 41 ++++++++++++++++++++++++++++++++++++++++-
1 file changed, 40 insertions(+), 1 deletion(-)
diff --git a/hw/arm/xilinx_zynq.c b/hw/arm/xilinx_zynq.c
index 9f89483..5bf03de 100644
--- a/hw/arm/xilinx_zynq.c
+++ b/hw/arm/xilinx_zynq.c
@@ -43,6 +43,41 @@ static const int dma_irqs[8] = {
46, 47, 48, 49, 72, 73, 74, 75
};
+#define LOAD_ADDR 0x1000
+#define FW_BLOB_ADDR 0x0
+
+#define SLCR_ARM_PLL_OFFSET 0x100
+#define SLCR_LOCK_OFFSET 0x004
+#define SLCR_UNLOCK_OFFSET 0x008
+
+#define SLCR_XILINX_UNLOCK_KEY 0xdf0d
+#define SLCR_XILINX_LOCK_KEY 0x767b
+
+#define SLCR_WRITE(addr, val) \
+ 0xe3a01000 + extract32((val), 0, 8), \
+ 0xe3811c00 + extract32((val), 8, 8), \
+ 0xe3811800 + extract32((val), 16, 8), \
+ 0xe3811400 + extract32((val), 24, 8), \
+ 0xe5801000 + (addr),
+
+static void zynq_write_fw_blob(void)
+{
+ int n;
+ uint32_t fw_blob[] = {
+ 0xe3a004f8, /* mov r0, #0xf8000000 */
+ SLCR_WRITE(SLCR_UNLOCK_OFFSET, SLCR_XILINX_UNLOCK_KEY)
+ SLCR_WRITE(SLCR_ARM_PLL_OFFSET, 0x00014008)
+ //SLCR_WRITE(0x120, 0x1f000200)
+ SLCR_WRITE(SLCR_LOCK_OFFSET, SLCR_XILINX_LOCK_KEY)
+ 0xe12fff1e, /* bx lr */
+ };
+ for (n = 0; n < ARRAY_SIZE(fw_blob); n++) {
+ fw_blob[n] = tswap32(fw_blob[n]);
+ }
+ rom_add_blob_fixed("firmware", fw_blob, sizeof(fw_blob), FW_BLOB_ADDR);
+}
+
+
static struct arm_boot_info zynq_binfo = {};
static void gem_init(NICInfo *nd, uint32_t base, qemu_irq irq)
@@ -251,7 +286,11 @@ static void zynq_init(MachineState *machine)
zynq_binfo.initrd_filename = initrd_filename;
zynq_binfo.nb_cpus = 1;
zynq_binfo.board_id = 0xd32;
- zynq_binfo.loader_start = 0;
+ zynq_binfo.loader_start = LOAD_ADDR;
+ zynq_binfo.board_setup_blob = true;
+ zynq_binfo.board_setup_blob_addr = FW_BLOB_ADDR;
+
+ zynq_write_fw_blob();
arm_load_kernel(ARM_CPU(first_cpu), &zynq_binfo);
}
--
1.9.1