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From: Simon Glass <sjg@chromium.org>
To: u-boot@lists.denx.de
Subject: [U-Boot] [PATCH v3 17/18] x86: Add a way to jump from TPL to SPL
Date: Thu,  2 May 2019 10:52:27 -0600	[thread overview]
Message-ID: <20190502165229.203099-18-sjg@chromium.org> (raw)
In-Reply-To: <20190502165229.203099-1-sjg@chromium.org>

When TPL finishes it needs to jump to SPL with the stack set up correctly.
Add a function to handle this.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
---

Changes in v3: None
Changes in v2:
- Add a new patch allowing jumping from TPL to SPL

 arch/x86/cpu/start.S | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/arch/x86/cpu/start.S b/arch/x86/cpu/start.S
index 30fa7def464..4a82add76b7 100644
--- a/arch/x86/cpu/start.S
+++ b/arch/x86/cpu/start.S
@@ -190,6 +190,19 @@ board_init_f_r_trampoline:
 	/* Re-enter U-Boot by calling board_init_f_r() */
 	call	board_init_f_r
 
+#ifdef CONFIG_TPL
+.globl jump_to_spl
+.type jump_to_spl, @function
+jump_to_spl:
+	/* Reset stack to the top of CAR space */
+	movl	$(CONFIG_SYS_CAR_ADDR + CONFIG_SYS_CAR_SIZE - 4), %esp
+#ifdef CONFIG_DCACHE_RAM_MRC_VAR_SIZE
+	subl	$CONFIG_DCACHE_RAM_MRC_VAR_SIZE, %esp
+#endif
+
+	jmp	*%eax
+#endif
+
 die:
 	hlt
 	jmp	die
-- 
2.21.0.1020.gf2820cf01a-goog

  parent reply	other threads:[~2019-05-02 16:52 UTC|newest]

Thread overview: 42+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-05-02 16:52 [U-Boot] [PATCH v3 00/18] x86: Add support for booting from TPL Simon Glass
2019-05-02 16:52 ` [U-Boot] [PATCH v3 01/18] cros_ec: Use a hyphen in the uclass name Simon Glass
2019-05-07  9:10   ` Bin Meng
2019-05-07  9:21     ` Bin Meng
2019-05-02 16:52 ` [U-Boot] [PATCH v3 02/18] x86: Add a simple TPL implementation Simon Glass
2019-05-07  9:21   ` Bin Meng
2019-05-02 16:52 ` [U-Boot] [PATCH v3 03/18] x86: sysreset: Separate out the EFI code Simon Glass
2019-05-07  9:21   ` Bin Meng
2019-05-02 16:52 ` [U-Boot] [PATCH v3 04/18] x86: sysreset: Implement power-off if available Simon Glass
2019-05-07  9:21   ` Bin Meng
2019-05-02 16:52 ` [U-Boot] [PATCH v3 05/18] x86: sysreset: Implement the get_last() method Simon Glass
2019-05-07  9:21   ` Bin Meng
2019-05-02 16:52 ` [U-Boot] [PATCH v3 06/18] x86: Add documention on the samus flashmap Simon Glass
2019-05-07  9:21   ` Bin Meng
2019-05-02 16:52 ` [U-Boot] [PATCH v3 07/18] x86: samus: Update device tree for SPL Simon Glass
2019-05-07  9:10   ` Bin Meng
2019-05-02 16:52 ` [U-Boot] [PATCH v3 08/18] x86: samus: Update device tree for verified boot Simon Glass
2019-05-02 16:52 ` [U-Boot] [PATCH v3 09/18] x86: Update device tree for TPL Simon Glass
2019-05-07  9:10   ` Bin Meng
2019-05-07  9:26     ` Bin Meng
2019-05-02 16:52 ` [U-Boot] [PATCH v3 10/18] x86: Update device tree for Chromium OS verified boot Simon Glass
2019-05-07  9:26   ` Bin Meng
2019-05-02 16:52 ` [U-Boot] [PATCH v3 11/18] x86: Fix device-tree indentation Simon Glass
2019-05-07  9:26   ` Bin Meng
2019-05-02 16:52 ` [U-Boot] [PATCH v3 12/18] x86: samus: Increase the pre-reloc memory again Simon Glass
2019-05-07  9:26   ` Bin Meng
2019-05-02 16:52 ` [U-Boot] [PATCH v3 13/18] Revert "pci: Scale MAX_PCI_REGIONS based on CONFIG_NR_DRAM_BANKS" Simon Glass
2019-05-02 16:52 ` [U-Boot] [PATCH v3 14/18] x86: Enable the RTC on all boards Simon Glass
2019-05-07  9:10   ` Bin Meng
2019-05-07  9:31     ` Bin Meng
2019-05-02 16:52 ` [U-Boot] [PATCH v3 15/18] x86: Update the memory map a little Simon Glass
2019-05-07  9:31   ` Bin Meng
2019-05-07  9:46     ` Bin Meng
2019-05-02 16:52 ` [U-Boot] [PATCH v3 16/18] x86: broadwell: Update PCH to work in TPL Simon Glass
2019-05-07  9:31   ` Bin Meng
2019-05-02 16:52 ` Simon Glass [this message]
2019-05-07  9:31   ` [U-Boot] [PATCH v3 17/18] x86: Add a way to jump from TPL to SPL Bin Meng
2019-05-02 16:52 ` [U-Boot] [PATCH v3 18/18] x86: samus: Add a target to boot through TPL Simon Glass
2019-05-07 10:07 ` [U-Boot] [PATCH v3 00/18] x86: Add support for booting from TPL Bin Meng
2019-05-08  3:33   ` Bin Meng
2019-05-08  3:41     ` Simon Glass
2019-05-08  4:52       ` Bin Meng

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